256763210 has 64 divisors (see below), whose sum is σ = 516077568. Its totient is φ = 91960000.

The previous prime is 256763201. The next prime is 256763219. The reversal of 256763210 is 12367652.

It is an interprime number because it is at equal distance from previous prime (256763201) and next prime (256763219).

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256763219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1344215 + ... + 1344405.

It is an arithmetic number, because the mean of its divisors is an integer number (8063712).

Almost surely, 2^256763210 is an apocalyptic number.

256763210 is an abundant number, since it is smaller than the sum of its proper divisors (259314358).

256763210 is a wasteful number, since it uses less digits than its factorization.

256763210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 256763210 is about 16023.8325627797. The cubic root of 256763210 is about 635.5907949450.

The spelling of 256763210 in words is "two hundred fifty-six million, seven hundred sixty-three thousand, two hundred ten".