39939504 has 80 divisors (see below), whose sum is σ = 114337920. Its totient is φ = 11911680.

The previous prime is 39939503. The next prime is 39939527. The reversal of 39939504 is 40593993.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (39939503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34812 + ... + 35940.

It is an arithmetic number, because the mean of its divisors is an integer number (1429224).

Almost surely, 2^39939504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39939504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57168960).

39939504 is an abundant number, since it is smaller than the sum of its proper divisors (74398416).

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

39939504 is a wasteful number, since it uses less digits than its factorization.

39939504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218 (or 1212 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 42.

The square root of 39939504 is about 6319.7708819229. The cubic root of 39939504 is about 341.8226911692.

It can be divided in two parts, 399 and 39504, that added together give a triangular number (39903 = T₂₈₂).

The spelling of 39939504 in words is "thirty-nine million, nine hundred thirty-nine thousand, five hundred four".