256340432 has 10 divisors (see below), whose sum is σ = 496659618. Its totient is φ = 128170208.

The previous prime is 256340417. The next prime is 256340471. The reversal of 256340432 is 234043652.

It can be written as a sum of positive squares in only one way, i.e., 247244176 + 9096256 = 15724^2 + 3016^2 .

It is a junction number, because it is equal to n+sod(n) for n = 256340395 and 256340404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8010623 + ... + 8010654.

Almost surely, 2^256340432 is an apocalyptic number.

It is an amenable number.

256340432 is a deficient number, since it is larger than the sum of its proper divisors (240319186).

256340432 is a wasteful number, since it uses less digits than its factorization.

256340432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16021285 (or 16021279 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 29.

The square root of 256340432 is about 16010.6349655471. The cubic root of 256340432 is about 635.2417555515.

The spelling of 256340432 in words is "two hundred fifty-six million, three hundred forty thousand, four hundred thirty-two".