38991144 has 32 divisors (see below), whose sum is σ = 97632000. Its totient is φ = 12976512.

The previous prime is 38991137. The next prime is 38991157. The reversal of 38991144 is 44119983.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

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, 26377 + ... + 27815.

It is an arithmetic number, because the mean of its divisors is an integer number (3051000).

Almost surely, 2^38991144 is an apocalyptic number.

It is an amenable number.

38991144 is an abundant number, since it is smaller than the sum of its proper divisors (58640856).

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

38991144 is a wasteful number, since it uses less digits than its factorization.

38991144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2577 (or 2573 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 38991144 is about 6244.2889106767. The cubic root of 38991144 is about 339.0954734962.

The spelling of 38991144 in words is "thirty-eight million, nine hundred ninety-one thousand, one hundred forty-four".