381043660 has 24 divisors (see below), whose sum is σ = 805568400. Its totient is φ = 151393344.

The previous prime is 381043657. The next prime is 381043681. The reversal of 381043660 is 66340183.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60954 + ... + 66913.

It is an arithmetic number, because the mean of its divisors is an integer number (33565350).

Almost surely, 2^381043660 is an apocalyptic number.

It is an amenable number.

381043660 is an abundant number, since it is smaller than the sum of its proper divisors (424524740).

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

381043660 is a wasteful number, since it uses less digits than its factorization.

381043660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128025 (or 128023 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 381043660 is about 19520.3396486844. The cubic root of 381043660 is about 724.9781428210.

The spelling of 381043660 in words is "three hundred eighty-one million, forty-three thousand, six hundred sixty".