256747052 has 24 divisors (see below), whose sum is σ = 460382832. Its totient is φ = 125236800.

The previous prime is 256747037. The next prime is 256747061. The reversal of 256747052 is 250747652.

It is a happy number.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 256746997 and 256747015.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35027 + ... + 41717.

It is an arithmetic number, because the mean of its divisors is an integer number (19182618).

Almost surely, 2^256747052 is an apocalyptic number.

It is an amenable number.

256747052 is a deficient number, since it is larger than the sum of its proper divisors (203635780).

256747052 is a wasteful number, since it uses less digits than its factorization.

256747052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6929 (or 6927 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 38.

The square root of 256747052 is about 16023.3283683509. The cubic root of 256747052 is about 635.5774621789.

The spelling of 256747052 in words is "two hundred fifty-six million, seven hundred forty-seven thousand, fifty-two".