38931489 has 16 divisors (see below), whose sum is σ = 58539840. Its totient is φ = 25565760.

The previous prime is 38931467. The next prime is 38931491. The reversal of 38931489 is 98413983.

It is not a de Polignac number, because 38931489 - 2¹¹ = 38929441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38931419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8952 + ... + 12569.

It is an arithmetic number, because the mean of its divisors is an integer number (3658740).

Almost surely, 2^38931489 is an apocalyptic number.

It is an amenable number.

38931489 is a deficient number, since it is larger than the sum of its proper divisors (19608351).

38931489 is a wasteful number, since it uses less digits than its factorization.

38931489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21597 (or 21591 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 38931489 is about 6239.5103173246. The cubic root of 38931489 is about 338.9224507396.

It can be divided in two parts, 389314 and 89, that added together give a triangular number (389403 = T₈₈₂).

The spelling of 38931489 in words is "thirty-eight million, nine hundred thirty-one thousand, four hundred eighty-nine".