256567450 has 24 divisors (see below), whose sum is σ = 502333920. Its totient is φ = 97225200.

The previous prime is 256567447. The next prime is 256567471. The reversal of 256567450 is 54765652.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134086 + ... + 135985.

It is an arithmetic number, because the mean of its divisors is an integer number (20930580).

Almost surely, 2^256567450 is an apocalyptic number.

256567450 is a deficient number, since it is larger than the sum of its proper divisors (245766470).

256567450 is a wasteful number, since it uses less digits than its factorization.

256567450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270102 (or 270097 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 40.

The square root of 256567450 is about 16017.7229967308. The cubic root of 256567450 is about 635.4292259932.

The spelling of 256567450 in words is "two hundred fifty-six million, five hundred sixty-seven thousand, four hundred fifty".