381652660 has 12 divisors (see below), whose sum is σ = 801470628. Its totient is φ = 152661056.

The previous prime is 381652637. The next prime is 381652693. The reversal of 381652660 is 66256183.

It can be written as a sum of positive squares in 2 ways, for example, as 71470116 + 310182544 = 8454^2 + 17612^2 .

It is a congruent number.

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, 9541297 + ... + 9541336.

It is an arithmetic number, because the mean of its divisors is an integer number (66789219).

Almost surely, 2^381652660 is an apocalyptic number.

It is an amenable number.

381652660 is an abundant number, since it is smaller than the sum of its proper divisors (419817968).

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

381652660 is a wasteful number, since it uses less digits than its factorization.

381652660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19082642 (or 19082640 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 381652660 is about 19535.9325346910. The cubic root of 381652660 is about 725.3641674246.

The spelling of 381652660 in words is "three hundred eighty-one million, six hundred fifty-two thousand, six hundred sixty".