381635916 has 48 divisors (see below), whose sum is σ = 929617920. Its totient is φ = 121714560.

The previous prime is 381635899. The next prime is 381635921. The reversal of 381635916 is 619536183.

It is a happy number.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27345 + ... + 38871.

It is an arithmetic number, because the mean of its divisors is an integer number (19367040).

Almost surely, 2^381635916 is an apocalyptic number.

It is an amenable number.

381635916 is an abundant number, since it is smaller than the sum of its proper divisors (547982004).

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

381635916 is a wasteful number, since it uses less digits than its factorization.

381635916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11654 (or 11652 counting only the distinct ones).

The product of its digits is 116640, while the sum is 42.

The square root of 381635916 is about 19535.5039863322. The cubic root of 381635916 is about 725.3535594587.

The spelling of 381635916 in words is "three hundred eighty-one million, six hundred thirty-five thousand, nine hundred sixteen".