39997884 has 24 divisors (see below), whose sum is σ = 94203648. Its totient is φ = 13207600.

The previous prime is 39997871. The next prime is 39997927. The reversal of 39997884 is 48879993.

It is a congruent number.

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, 14292 + ... + 16859.

It is an arithmetic number, because the mean of its divisors is an integer number (3925152).

Almost surely, 2^39997884 is an apocalyptic number.

It is an amenable number.

39997884 is an abundant number, since it is smaller than the sum of its proper divisors (54205764).

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

39997884 is a wasteful number, since it uses less digits than its factorization.

39997884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31265 (or 31263 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 57.

The square root of 39997884 is about 6324.3880336361. The cubic root of 39997884 is about 341.9891587138.

The spelling of 39997884 in words is "thirty-nine million, nine hundred ninety-seven thousand, eight hundred eighty-four".