38721888 has 60 divisors (see below), whose sum is σ = 113887620. Its totient is φ = 12906432.

The previous prime is 38721871. The next prime is 38721911. The reversal of 38721888 is 88812783.

It is a happy number.

It is a super-2 number, since 2×38721888² = 2998769220569088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4878 + ... + 10061.

It is an arithmetic number, because the mean of its divisors is an integer number (1898127).

Almost surely, 2^38721888 is an apocalyptic number.

It is an amenable number.

38721888 is an abundant number, since it is smaller than the sum of its proper divisors (75165732).

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

38721888 is a wasteful number, since it uses less digits than its factorization.

38721888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14961 (or 14944 counting only the distinct ones).

The product of its digits is 172032, while the sum is 45.

The square root of 38721888 is about 6222.6913791381. The cubic root of 38721888 is about 338.3131208991.

The spelling of 38721888 in words is "thirty-eight million, seven hundred twenty-one thousand, eight hundred eighty-eight".