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128770422 = 231123412069
BaseRepresentation
bin1111010110011…
…10000101110110
322222022012210220
413223032011312
5230431123142
620435555210
73122346654
oct753160566
9288265726
10128770422
1166762140
123715bb06
13208a7c21
141315ddd4
15b4892ec
hex7ace176

128770422 has 64 divisors (see below), whose sum is σ = 300464640. Its totient is φ = 36396800.

The previous prime is 128770409. The next prime is 128770487. The reversal of 128770422 is 224077821.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61204 + ... + 63272.

It is an arithmetic number, because the mean of its divisors is an integer number (4694760).

Almost surely, 2128770422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128770422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150232320).

128770422 is an abundant number, since it is smaller than the sum of its proper divisors (171694218).

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

128770422 is a wasteful number, since it uses less digits than its factorization.

128770422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2149.

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 128770422 is about 11347.7055830683. The cubic root of 128770422 is about 504.9775136215.

The spelling of 128770422 in words is "one hundred twenty-eight million, seven hundred seventy thousand, four hundred twenty-two".

Divisors: 1 2 3 6 11 22 23 33 41 46 66 69 82 123 138 246 253 451 506 759 902 943 1353 1518 1886 2069 2706 2829 4138 5658 6207 10373 12414 20746 22759 31119 45518 47587 62238 68277 84829 95174 136554 142761 169658 254487 285522 508974 523457 933119 1046914 1570371 1866238 1951067 2799357 3140742 3902134 5598714 5853201 11706402 21461737 42923474 64385211 128770422