256374646 has 32 divisors (see below), whose sum is σ = 427991040. Its totient is φ = 114206400.

The previous prime is 256374641. The next prime is 256374653. The reversal of 256374646 is 646473652.

It is a super-2 number, since 2×256374646² = 131455918223250632, which contains 22 as substring.

Its product of digits (725760) is a multiple of the sum of its prime divisors (1260).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256374641) 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, 248151 + ... + 249181.

It is an arithmetic number, because the mean of its divisors is an integer number (13374720).

Almost surely, 2^256374646 is an apocalyptic number.

256374646 is a deficient number, since it is larger than the sum of its proper divisors (171616394).

256374646 is a wasteful number, since it uses less digits than its factorization.

256374646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260.

The product of its digits is 725760, while the sum is 43.

The square root of 256374646 is about 16011.7034071956. The cubic root of 256374646 is about 635.2700164002.

The spelling of 256374646 in words is "two hundred fifty-six million, three hundred seventy-four thousand, six hundred forty-six".