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42478236 = 22332511567
BaseRepresentation
bin1010001000001…
…0101010011100
32221221010012000
42202002222130
541333300421
64114242300
71024026153
oct242025234
987833160
1042478236
1121a83589
1212286390
138a53868
1458da59a
153ae1226
hex2882a9c

42478236 has 48 divisors (see below), whose sum is σ = 110638080. Its totient is φ = 14094000.

The previous prime is 42478229. The next prime is 42478237. The reversal of 42478236 is 63287424.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 42478236.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42478237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26325 + ... + 27891.

It is an arithmetic number, because the mean of its divisors is an integer number (2304960).

Almost surely, 242478236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42478236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55319040).

42478236 is an abundant number, since it is smaller than the sum of its proper divisors (68159844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42478236 is a wasteful number, since it uses less digits than its factorization.

42478236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1831 (or 1823 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 42478236 is about 6517.5329688464. The cubic root of 42478236 is about 348.9170225524.

The spelling of 42478236 in words is "forty-two million, four hundred seventy-eight thousand, two hundred thirty-six".

Divisors: 1 2 3 4 6 9 12 18 27 36 54 108 251 502 753 1004 1506 1567 2259 3012 3134 4518 4701 6268 6777 9036 9402 13554 14103 18804 27108 28206 42309 56412 84618 169236 393317 786634 1179951 1573268 2359902 3539853 4719804 7079706 10619559 14159412 21239118 42478236