256241390 has 64 divisors (see below), whose sum is σ = 510572160. Its totient is φ = 92252160.

The previous prime is 256241341. The next prime is 256241441. The reversal of 256241390 is 93142652.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 273002 + ... + 273938.

It is an arithmetic number, because the mean of its divisors is an integer number (7977690).

Almost surely, 2^256241390 is an apocalyptic number.

256241390 is a deficient number, since it is larger than the sum of its proper divisors (254330770).

256241390 is a wasteful number, since it uses less digits than its factorization.

256241390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 256241390 is about 16007.5416601051. The cubic root of 256241390 is about 635.1599324356.

The spelling of 256241390 in words is "two hundred fifty-six million, two hundred forty-one thousand, three hundred ninety".