256436054 has 16 divisors (see below), whose sum is σ = 445171200. Its totient is φ = 108509544.

The previous prime is 256436051. The next prime is 256436069. The reversal of 256436054 is 450634652.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256436051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114824 + ... + 117035.

It is an arithmetic number, because the mean of its divisors is an integer number (27823200).

Almost surely, 2^256436054 is an apocalyptic number.

256436054 is a deficient number, since it is larger than the sum of its proper divisors (188735146).

256436054 is a wasteful number, since it uses less digits than its factorization.

256436054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231947.

The product of its (nonzero) digits is 86400, while the sum is 35.

The square root of 256436054 is about 16013.6208897301. The cubic root of 256436054 is about 635.3207332548.

The spelling of 256436054 in words is "two hundred fifty-six million, four hundred thirty-six thousand, fifty-four".