381187880 has 32 divisors (see below), whose sum is σ = 902815200. Its totient is φ = 144449856.

The previous prime is 381187843. The next prime is 381187897. The reversal of 381187880 is 88781183.

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, 250022 + ... + 251541.

It is an arithmetic number, because the mean of its divisors is an integer number (28212975).

Almost surely, 2^381187880 is an apocalyptic number.

It is an amenable number.

381187880 is an abundant number, since it is smaller than the sum of its proper divisors (521627320).

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

381187880 is a wasteful number, since it uses less digits than its factorization.

381187880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501593 (or 501589 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 44.

The square root of 381187880 is about 19524.0333947676. The cubic root of 381187880 is about 725.0695961727.

The spelling of 381187880 in words is "three hundred eighty-one million, one hundred eighty-seven thousand, eight hundred eighty".