381766364 has 24 divisors (see below), whose sum is σ = 788164608. Its totient is φ = 158335920.

The previous prime is 381766349. The next prime is 381766369. The reversal of 381766364 is 463667183.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381766369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219044 + ... + 220779.

It is an arithmetic number, because the mean of its divisors is an integer number (32840192).

Almost surely, 2^381766364 is an apocalyptic number.

It is an amenable number.

381766364 is an abundant number, since it is smaller than the sum of its proper divisors (406398244).

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

381766364 is a wasteful number, since it uses less digits than its factorization.

381766364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439865 (or 439863 counting only the distinct ones).

The product of its digits is 435456, while the sum is 44.

The square root of 381766364 is about 19538.8424426832. The cubic root of 381766364 is about 725.4361950619.

The spelling of 381766364 in words is "three hundred eighty-one million, seven hundred sixty-six thousand, three hundred sixty-four".