256902630 has 16 divisors (see below), whose sum is σ = 616566384. Its totient is φ = 68507360.

The previous prime is 256902601. The next prime is 256902641. The reversal of 256902630 is 36209652.

It is a super-2 number, since 2×256902630² = 131997922601833800, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 256902591 and 256902600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4281681 + ... + 4281740.

It is an arithmetic number, because the mean of its divisors is an integer number (38535399).

Almost surely, 2^256902630 is an apocalyptic number.

256902630 is an abundant number, since it is smaller than the sum of its proper divisors (359663754).

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

256902630 is a wasteful number, since it uses less digits than its factorization.

256902630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8563431.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 256902630 is about 16028.1823673179. The cubic root of 256902630 is about 635.7058140640.

The spelling of 256902630 in words is "two hundred fifty-six million, nine hundred two thousand, six hundred thirty".