381366956 has 12 divisors (see below), whose sum is σ = 696409392. Its totient is φ = 182392848.

The previous prime is 381366943. The next prime is 381366971. The reversal of 381366956 is 659663183.

381366956 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

381366956 is strictly pandigital in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 381366956.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2072555 + ... + 2072738.

It is an arithmetic number, because the mean of its divisors is an integer number (58034116).

Almost surely, 2^381366956 is an apocalyptic number.

It is an amenable number.

381366956 is a deficient number, since it is larger than the sum of its proper divisors (315042436).

381366956 is a wasteful number, since it uses less digits than its factorization.

381366956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4145320 (or 4145318 counting only the distinct ones).

The product of its digits is 699840, while the sum is 47.

The square root of 381366956 is about 19528.6188963787. The cubic root of 381366956 is about 725.1831204499.

The spelling of 381366956 in words is "three hundred eighty-one million, three hundred sixty-six thousand, nine hundred fifty-six".