381238656 has 32 divisors (see below), whose sum is σ = 1012666200. Its totient is φ = 127079424.

The previous prime is 381238621. The next prime is 381238657. The reversal of 381238656 is 656832183.

It is a tau number, because it is divible by the number of its divisors (32).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381238657) 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, 496021 + ... + 496788.

Almost surely, 2^381238656 is an apocalyptic number.

It is an amenable number.

381238656 is an abundant number, since it is smaller than the sum of its proper divisors (631427544).

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

381238656 is an equidigital number, since it uses as much as digits as its factorization.

381238656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992826 (or 992814 counting only the distinct ones).

The product of its digits is 207360, while the sum is 42.

The square root of 381238656 is about 19525.3336975325. Note that the first 3 decimals coincide. The cubic root of 381238656 is about 725.1017889584.

The spelling of 381238656 in words is "three hundred eighty-one million, two hundred thirty-eight thousand, six hundred fifty-six".