381015884 has 24 divisors (see below), whose sum is σ = 700401408. Its totient is φ = 181011600.

The previous prime is 381015881. The next prime is 381015889. The reversal of 381015884 is 488510183.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (381015881) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 179 + ... + 27605.

It is an arithmetic number, because the mean of its divisors is an integer number (29183392).

Almost surely, 2^381015884 is an apocalyptic number.

It is an amenable number.

381015884 is a deficient number, since it is larger than the sum of its proper divisors (319385524).

381015884 is a wasteful number, since it uses less digits than its factorization.

381015884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27605 (or 27603 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 381015884 is about 19519.6281726881. The cubic root of 381015884 is about 724.9605267451.

The spelling of 381015884 in words is "three hundred eighty-one million, fifteen thousand, eight hundred eighty-four".