256653430 has 32 divisors (see below), whose sum is σ = 510064128. Its totient is φ = 92200800.

The previous prime is 256653409. The next prime is 256653431. The reversal of 256653430 is 34356652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256653431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4926 + ... + 23185.

It is an arithmetic number, because the mean of its divisors is an integer number (15939504).

Almost surely, 2^256653430 is an apocalyptic number.

256653430 is a deficient number, since it is larger than the sum of its proper divisors (253410698).

256653430 is a wasteful number, since it uses less digits than its factorization.

256653430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28212.

The product of its (nonzero) digits is 64800, while the sum is 34.

The square root of 256653430 is about 16020.4066739893. The cubic root of 256653430 is about 635.5001990168.

The spelling of 256653430 in words is "two hundred fifty-six million, six hundred fifty-three thousand, four hundred thirty".