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61463886 = 23112312731
BaseRepresentation
bin1110101001110…
…1110101001110
311021122200121020
43222131311032
5111213321021
610033215010
71344302001
oct352356516
9137580536
1061463886
1131770800
1218701466
13c970383
14823d538
1555e17c6
hex3a9dd4e

61463886 has 48 divisors (see below), whose sum is σ = 139528704. Its totient is φ = 18018000.

The previous prime is 61463881. The next prime is 61463887. The reversal of 61463886 is 68836416.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61463881) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21141 + ... + 23871.

It is an arithmetic number, because the mean of its divisors is an integer number (2906848).

Almost surely, 261463886 is an apocalyptic number.

61463886 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 61463886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69764352).

61463886 is an abundant number, since it is smaller than the sum of its proper divisors (78064818).

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

61463886 is a wasteful number, since it uses less digits than its factorization.

61463886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2789 (or 2778 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The square root of 61463886 is about 7839.8906880134. The cubic root of 61463886 is about 394.6450606337.

The spelling of 61463886 in words is "sixty-one million, four hundred sixty-three thousand, eight hundred eighty-six".

Divisors: 1 2 3 6 11 22 31 33 62 66 93 121 186 242 341 363 682 726 1023 2046 2731 3751 5462 7502 8193 11253 16386 22506 30041 60082 84661 90123 169322 180246 253983 330451 507966 660902 931271 991353 1862542 1982706 2793813 5587626 10243981 20487962 30731943 61463886