39979960 has 16 divisors (see below), whose sum is σ = 89955000. Its totient is φ = 15991968.

The previous prime is 39979897. The next prime is 39979963. The reversal of 39979960 is 6997993.

It is a junction number, because it is equal to n+sod(n) for n = 39979898 and 39979907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39979963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499710 + ... + 499789.

Almost surely, 2^39979960 is an apocalyptic number.

It is an amenable number.

39979960 is an abundant number, since it is smaller than the sum of its proper divisors (49975040).

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

39979960 is a wasteful number, since it uses less digits than its factorization.

39979960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999510 (or 999506 counting only the distinct ones).

The product of its (nonzero) digits is 826686, while the sum is 52.

The square root of 39979960 is about 6322.9708207456. The cubic root of 39979960 is about 341.9380665982.

The spelling of 39979960 in words is "thirty-nine million, nine hundred seventy-nine thousand, nine hundred sixty".