39139872 has 24 divisors (see below), whose sum is σ = 102742416. Its totient is φ = 13046592.

The previous prime is 39139843. The next prime is 39139883. The reversal of 39139872 is 27893193.

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203758 + ... + 203949.

It is an arithmetic number, because the mean of its divisors is an integer number (4280934).

Almost surely, 2^39139872 is an apocalyptic number.

39139872 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

39139872 is an abundant number, since it is smaller than the sum of its proper divisors (63602544).

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

39139872 is a wasteful number, since it uses less digits than its factorization.

39139872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407720 (or 407712 counting only the distinct ones).

The product of its digits is 81648, while the sum is 42.

The square root of 39139872 is about 6256.1866979814. The cubic root of 39139872 is about 339.5260755767.

The spelling of 39139872 in words is "thirty-nine million, one hundred thirty-nine thousand, eight hundred seventy-two".