256743924 has 24 divisors (see below), whose sum is σ = 599769408. Its totient is φ = 85481280.

The previous prime is 256743923. The next prime is 256743959. The reversal of 256743924 is 429347652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256743923) 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 7 ways as a sum of consecutive naturals, for example, 1417 + ... + 22704.

It is an arithmetic number, because the mean of its divisors is an integer number (24990392).

Almost surely, 2^256743924 is an apocalyptic number.

It is an amenable number.

256743924 is an abundant number, since it is smaller than the sum of its proper divisors (343025484).

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

256743924 is a wasteful number, since it uses less digits than its factorization.

256743924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25015 (or 25013 counting only the distinct ones).

The product of its digits is 362880, while the sum is 42.

The square root of 256743924 is about 16023.2307603679. The cubic root of 256743924 is about 635.5748810465.

The spelling of 256743924 in words is "two hundred fifty-six million, seven hundred forty-three thousand, nine hundred twenty-four".