256740832 has 12 divisors (see below), whose sum is σ = 505458576. Its totient is φ = 128370400.

The previous prime is 256740821. The next prime is 256740833. The reversal of 256740832 is 238047652.

It is a junction number, because it is equal to n+sod(n) for n = 256740791 and 256740800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256740833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4011544 + ... + 4011607.

It is an arithmetic number, because the mean of its divisors is an integer number (42121548).

Almost surely, 2^256740832 is an apocalyptic number.

It is an amenable number.

256740832 is a deficient number, since it is larger than the sum of its proper divisors (248717744).

256740832 is an equidigital number, since it uses as much as digits as its factorization.

256740832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8023161 (or 8023153 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 256740832 is about 16023.1342751660. The cubic root of 256740832 is about 635.5723295997.

The spelling of 256740832 in words is "two hundred fifty-six million, seven hundred forty thousand, eight hundred thirty-two".