38491240 has 32 divisors (see below), whose sum is σ = 86868000. Its totient is φ = 15349824.

The previous prime is 38491237. The next prime is 38491267. The reversal of 38491240 is 4219483.

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 7 ways as a sum of consecutive naturals, for example, 13891 + ... + 16429.

It is an arithmetic number, because the mean of its divisors is an integer number (2714625).

Almost surely, 2^38491240 is an apocalyptic number.

It is an amenable number.

38491240 is an abundant number, since it is smaller than the sum of its proper divisors (48376760).

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

38491240 is a wasteful number, since it uses less digits than its factorization.

38491240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2929 (or 2925 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 38491240 is about 6204.1308819205. The cubic root of 38491240 is about 337.6400589243.

The spelling of 38491240 in words is "thirty-eight million, four hundred ninety-one thousand, two hundred forty".