38431881 has 8 divisors (see below), whose sum is σ = 56936160. Its totient is φ = 25621236.

The previous prime is 38431879. The next prime is 38431901. The reversal of 38431881 is 18813483.

It is not a de Polignac number, because 38431881 - 2¹ = 38431879 is a prime.

It is a super-2 number, since 2×38431881² = 2954018954396322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38431871) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 711675 + ... + 711728.

It is an arithmetic number, because the mean of its divisors is an integer number (7117020).

Almost surely, 2^38431881 is an apocalyptic number.

It is an amenable number.

38431881 is a deficient number, since it is larger than the sum of its proper divisors (18504279).

38431881 is a wasteful number, since it uses less digits than its factorization.

38431881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423412 (or 1423406 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 38431881 is about 6199.3452073586. The cubic root of 38431881 is about 337.4664065329.

The spelling of 38431881 in words is "thirty-eight million, four hundred thirty-one thousand, eight hundred eighty-one".