381959172 has 48 divisors (see below), whose sum is σ = 1131733120. Its totient is φ = 109130976.

The previous prime is 381959129. The next prime is 381959243. The reversal of 381959172 is 271959183.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251863 + ... + 253374.

Almost surely, 2^381959172 is an apocalyptic number.

It is an amenable number.

381959172 is an abundant number, since it is smaller than the sum of its proper divisors (749773948).

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

381959172 is a wasteful number, since it uses less digits than its factorization.

381959172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505257 (or 505249 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 381959172 is about 19543.7757866795. The cubic root of 381959172 is about 725.5582997267.

It can be divided in two parts, 38 and 1959172, that added together give a triangular number (1959210 = T₁₉₇₉).

The spelling of 381959172 in words is "three hundred eighty-one million, nine hundred fifty-nine thousand, one hundred seventy-two".