256323090 has 64 divisors (see below), whose sum is σ = 626476032. Its totient is φ = 67108800.

The previous prime is 256323079. The next prime is 256323121. The reversal of 256323090 is 90323652.

256323090 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 774225 + ... + 774555.

It is an arithmetic number, because the mean of its divisors is an integer number (9788688).

Almost surely, 2^256323090 is an apocalyptic number.

256323090 is an abundant number, since it is smaller than the sum of its proper divisors (370152942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256323090 is a wasteful number, since it uses less digits than its factorization.

256323090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 256323090 is about 16010.0933788657. The cubic root of 256323090 is about 635.2274300562.

The spelling of 256323090 in words is "two hundred fifty-six million, three hundred twenty-three thousand, ninety".