381216580 has 12 divisors (see below), whose sum is σ = 800554860. Its totient is φ = 152486624.

The previous prime is 381216569. The next prime is 381216599. The reversal of 381216580 is 85612183.

It can be written as a sum of positive squares in 2 ways, for example, as 150601984 + 230614596 = 12272^2 + 15186^2 .

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, 9530395 + ... + 9530434.

It is an arithmetic number, because the mean of its divisors is an integer number (66712905).

Almost surely, 2^381216580 is an apocalyptic number.

It is an amenable number.

381216580 is an abundant number, since it is smaller than the sum of its proper divisors (419338280).

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

381216580 is a wasteful number, since it uses less digits than its factorization.

381216580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19060838 (or 19060836 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 381216580 is about 19524.7683725057. The cubic root of 381216580 is about 725.0877927771.

The spelling of 381216580 in words is "three hundred eighty-one million, two hundred sixteen thousand, five hundred eighty".