39988040 has 32 divisors (see below), whose sum is σ = 90823680. Its totient is φ = 15844032.

The previous prime is 39988031. The next prime is 39988043. The reversal of 39988040 is 4088993.

It is not an unprimeable number, because it can be changed into a prime (39988043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392 + ... + 8951.

It is an arithmetic number, because the mean of its divisors is an integer number (2838240).

Almost surely, 2^39988040 is an apocalyptic number.

It is an amenable number.

39988040 is an abundant number, since it is smaller than the sum of its proper divisors (50835640).

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

39988040 is a wasteful number, since it uses less digits than its factorization.

39988040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9461 (or 9457 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 39988040 is about 6323.6097286281. The cubic root of 39988040 is about 341.9611004170.

The spelling of 39988040 in words is "thirty-nine million, nine hundred eighty-eight thousand, forty".