381808580 has 24 divisors (see below), whose sum is σ = 811950720. Its totient is φ = 150789600.

The previous prime is 381808573. The next prime is 381808613. The reversal of 381808580 is 85808183.

It is a happy number.

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, 119246 + ... + 122405.

It is an arithmetic number, because the mean of its divisors is an integer number (33831280).

Almost surely, 2^381808580 is an apocalyptic number.

It is an amenable number.

381808580 is an abundant number, since it is smaller than the sum of its proper divisors (430142140).

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

381808580 is a wasteful number, since it uses less digits than its factorization.

381808580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241739 (or 241737 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 41.

The square root of 381808580 is about 19539.9227224675. The cubic root of 381808580 is about 725.4629338289.

The spelling of 381808580 in words is "three hundred eighty-one million, eight hundred eight thousand, five hundred eighty".