256404354 has 32 divisors (see below), whose sum is σ = 549996480. Its totient is φ = 79440192.

The previous prime is 256404349. The next prime is 256404361. The reversal of 256404354 is 453404652.

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, 15177 + ... + 27260.

It is an arithmetic number, because the mean of its divisors is an integer number (17187390).

Almost surely, 2^256404354 is an apocalyptic number.

256404354 is an abundant number, since it is smaller than the sum of its proper divisors (293592126).

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

256404354 is a wasteful number, since it uses less digits than its factorization.

256404354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42514.

The product of its (nonzero) digits is 57600, while the sum is 33.

The square root of 256404354 is about 16012.6310767469. The cubic root of 256404354 is about 635.2945532425.

The spelling of 256404354 in words is "two hundred fifty-six million, four hundred four thousand, three hundred fifty-four".