381636306 has 32 divisors (see below), whose sum is σ = 849654720. Its totient is φ = 126976032.

The previous prime is 381636293. The next prime is 381636329. The reversal of 381636306 is 603636183.

381636306 is a `hidden beast` number, since 3 + 8 + 16 + 3 + 630 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24126 + ... + 36678.

It is an arithmetic number, because the mean of its divisors is an integer number (26551710).

Almost surely, 2^381636306 is an apocalyptic number.

381636306 is an abundant number, since it is smaller than the sum of its proper divisors (468018414).

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

381636306 is a wasteful number, since it uses less digits than its factorization.

381636306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13127 (or 13121 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 381636306 is about 19535.5139681555. The cubic root of 381636306 is about 725.3538065422.

The spelling of 381636306 in words is "three hundred eighty-one million, six hundred thirty-six thousand, three hundred six".