381365685 has 32 divisors (see below), whose sum is σ = 684996480. Its totient is φ = 201291264.

The previous prime is 381365683. The next prime is 381365693. The reversal of 381365685 is 586563183.

381365685 is a `hidden beast` number, since 3 + 81 + 3 + 6 + 568 + 5 = 666.

It is not a de Polignac number, because 381365685 - 2¹ = 381365683 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 381365685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381365683) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1467 + ... + 27656.

It is an arithmetic number, because the mean of its divisors is an integer number (21406140).

Almost surely, 2^381365685 is an apocalyptic number.

It is an amenable number.

381365685 is a deficient number, since it is larger than the sum of its proper divisors (303630795).

381365685 is a wasteful number, since it uses less digits than its factorization.

381365685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29234 (or 29228 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 381365685 is about 19528.5863543678. The cubic root of 381365685 is about 725.1823148314.

The spelling of 381365685 in words is "three hundred eighty-one million, three hundred sixty-five thousand, six hundred eighty-five".