39939960 has 128 divisors (see below), whose sum is σ = 129600000. Its totient is φ = 9816576.

The previous prime is 39939959. The next prime is 39939961. The reversal of 39939960 is 6993993.

It is an interprime number because it is at equal distance from previous prime (39939959) and next prime (39939961).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39939961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79791 + ... + 80289.

It is an arithmetic number, because the mean of its divisors is an integer number (1012500).

Almost surely, 2^39939960 is an apocalyptic number.

39939960 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39939960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64800000).

39939960 is an abundant number, since it is smaller than the sum of its proper divisors (89660040).

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

39939960 is a wasteful number, since it uses less digits than its factorization.

39939960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565 (or 561 counting only the distinct ones).

The product of its (nonzero) digits is 354294, while the sum is 48.

The square root of 39939960 is about 6319.8069590772. The cubic root of 39939960 is about 341.8239920580.

The spelling of 39939960 in words is "thirty-nine million, nine hundred thirty-nine thousand, nine hundred sixty".