256163772 has 12 divisors (see below), whose sum is σ = 597715496. Its totient is φ = 85387920.

The previous prime is 256163749. The next prime is 256163773. The reversal of 256163772 is 277361652.

256163772 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 256163772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256163773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10673479 + ... + 10673502.

Almost surely, 2^256163772 is an apocalyptic number.

It is an amenable number.

256163772 is an abundant number, since it is smaller than the sum of its proper divisors (341551724).

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

256163772 is a wasteful number, since it uses less digits than its factorization.

256163772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21346988 (or 21346986 counting only the distinct ones).

The product of its digits is 105840, while the sum is 39.

The square root of 256163772 is about 16005.1170567416. The cubic root of 256163772 is about 635.0957939264.

The spelling of 256163772 in words is "two hundred fifty-six million, one hundred sixty-three thousand, seven hundred seventy-two".