381352520 has 32 divisors (see below), whose sum is σ = 862800120. Its totient is φ = 151695360.

The previous prime is 381352507. The next prime is 381352561. The reversal of 381352520 is 25253183.

It can be written as a sum of positive squares in 4 ways, for example, as 167081476 + 214271044 = 12926^2 + 14638^2 .

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, 19097 + ... + 33576.

Almost surely, 2^381352520 is an apocalyptic number.

It is an amenable number.

381352520 is an abundant number, since it is smaller than the sum of its proper divisors (481447600).

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

381352520 is a wasteful number, since it uses less digits than its factorization.

381352520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52865 (or 52861 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 381352520 is about 19528.2492814896. The cubic root of 381352520 is about 725.1739701416.

The spelling of 381352520 in words is "three hundred eighty-one million, three hundred fifty-two thousand, five hundred twenty".