381307520 has 64 divisors (see below), whose sum is σ = 994451040. Its totient is φ = 138654720.

The previous prime is 381307517. The next prime is 381307567. The reversal of 381307520 is 25703183.

It is a tau number, because it is divible by the number of its divisors (64).

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, 20042 + ... + 34121.

Almost surely, 2^381307520 is an apocalyptic number.

It is an amenable number.

381307520 is an abundant number, since it is smaller than the sum of its proper divisors (613143520).

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

381307520 is a wasteful number, since it uses less digits than its factorization.

381307520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54193 (or 54181 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 381307520 is about 19527.0970704813. The cubic root of 381307520 is about 725.1454452549.

The spelling of 381307520 in words is "three hundred eighty-one million, three hundred seven thousand, five hundred twenty".