256105770 has 32 divisors (see below), whose sum is σ = 615074688. Its totient is φ = 68248128.

The previous prime is 256105741. The next prime is 256105771. The reversal of 256105770 is 77501652.

It is not an unprimeable number, because it can be changed into a prime (256105771) 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, 85132 + ... + 88088.

It is an arithmetic number, because the mean of its divisors is an integer number (19221084).

Almost surely, 2^256105770 is an apocalyptic number.

256105770 is an abundant number, since it is smaller than the sum of its proper divisors (358968918).

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

256105770 is a wasteful number, since it uses less digits than its factorization.

256105770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5854.

The product of its (nonzero) digits is 14700, while the sum is 33.

The square root of 256105770 is about 16003.3049711614. The cubic root of 256105770 is about 635.0478563556.

The spelling of 256105770 in words is "two hundred fifty-six million, one hundred five thousand, seven hundred seventy".