256157090 has 32 divisors (see below), whose sum is σ = 533312640. Its totient is φ = 86765184.

The previous prime is 256157089. The next prime is 256157113. The reversal of 256157090 is 90751652.

256157090 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 256157090.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16235 + ... + 27854.

It is an arithmetic number, because the mean of its divisors is an integer number (16666020).

Almost surely, 2^256157090 is an apocalyptic number.

256157090 is an abundant number, since it is smaller than the sum of its proper divisors (277155550).

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

256157090 is a wasteful number, since it uses less digits than its factorization.

256157090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44186.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 256157090 is about 16004.9083096405. The cubic root of 256157090 is about 635.0902717469.

The spelling of 256157090 in words is "two hundred fifty-six million, one hundred fifty-seven thousand, ninety".