256964430 has 32 divisors (see below), whose sum is σ = 625924224. Its totient is φ = 67500576.

The previous prime is 256964423. The next prime is 256964437. The reversal of 256964430 is 34469652.

It is an interprime number because it is at equal distance from previous prime (256964423) and next prime (256964437).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256964437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61912 + ... + 65931.

It is an arithmetic number, because the mean of its divisors is an integer number (19560132).

Almost surely, 2^256964430 is an apocalyptic number.

256964430 is an abundant number, since it is smaller than the sum of its proper divisors (368959794).

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

256964430 is a wasteful number, since it uses less digits than its factorization.

256964430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127920.

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 256964430 is about 16030.1101056730. The cubic root of 256964430 is about 635.7567846976.

The spelling of 256964430 in words is "two hundred fifty-six million, nine hundred sixty-four thousand, four hundred thirty".