38991576 has 64 divisors (see below), whose sum is σ = 107251200. Its totient is φ = 11737728.

The previous prime is 38991571. The next prime is 38991581. The reversal of 38991576 is 67519983.

It is an interprime number because it is at equal distance from previous prime (38991571) and next prime (38991581).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38991571) 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, 13335 + ... + 15993.

It is an arithmetic number, because the mean of its divisors is an integer number (1675800).

Almost surely, 2^38991576 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38991576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53625600).

38991576 is an abundant number, since it is smaller than the sum of its proper divisors (68259624).

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

38991576 is a wasteful number, since it uses less digits than its factorization.

38991576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2728 (or 2724 counting only the distinct ones).

The product of its digits is 408240, while the sum is 48.

The square root of 38991576 is about 6244.3235021898. The cubic root of 38991576 is about 339.0967258208.

The spelling of 38991576 in words is "thirty-eight million, nine hundred ninety-one thousand, five hundred seventy-six".