256414403 has 24 divisors (see below), whose sum is σ = 308161152. Its totient is φ = 212575104.

The previous prime is 256414391. The next prime is 256414421. The reversal of 256414403 is 304414652.

It is not a de Polignac number, because 256414403 - 2⁴ = 256414387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256414453) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 422126 + ... + 422732.

It is an arithmetic number, because the mean of its divisors is an integer number (12840048).

Almost surely, 2^256414403 is an apocalyptic number.

256414403 is a deficient number, since it is larger than the sum of its proper divisors (51746749).

256414403 is a wasteful number, since it uses less digits than its factorization.

256414403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891 (or 884 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 256414403 is about 16012.9448572085. The cubic root of 256414403 is about 635.3028526225.

The spelling of 256414403 in words is "two hundred fifty-six million, four hundred fourteen thousand, four hundred three".