38491836 has 24 divisors (see below), whose sum is σ = 91338240. Its totient is φ = 12612912.

The previous prime is 38491823. The next prime is 38491841. The reversal of 38491836 is 63819483.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26476 + ... + 27891.

It is an arithmetic number, because the mean of its divisors is an integer number (3805760).

Almost surely, 2^38491836 is an apocalyptic number.

It is an amenable number.

38491836 is an abundant number, since it is smaller than the sum of its proper divisors (52846404).

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

38491836 is a wasteful number, since it uses less digits than its factorization.

38491836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54433 (or 54431 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 38491836 is about 6204.1789142480. The cubic root of 38491836 is about 337.6418015930.

The spelling of 38491836 in words is "thirty-eight million, four hundred ninety-one thousand, eight hundred thirty-six".