381959656 has 16 divisors (see below), whose sum is σ = 771264900. Its totient is φ = 176289024.

The previous prime is 381959651. The next prime is 381959657. The reversal of 381959656 is 656959183.

It can be written as a sum of positive squares in 2 ways, for example, as 381420900 + 538756 = 19530^2 + 734^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (381959651) 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, 1836241 + ... + 1836448.

Almost surely, 2^381959656 is an apocalyptic number.

It is an amenable number.

381959656 is an abundant number, since it is smaller than the sum of its proper divisors (389305244).

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

381959656 is a wasteful number, since it uses less digits than its factorization.

381959656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3672708 (or 3672704 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 52.

The square root of 381959656 is about 19543.7881691345. The cubic root of 381959656 is about 725.5586061906.

The spelling of 381959656 in words is "three hundred eighty-one million, nine hundred fifty-nine thousand, six hundred fifty-six".