39952990 has 96 divisors (see below), whose sum is σ = 93078720. Its totient is φ = 12080640.

The previous prime is 39952967. The next prime is 39953021. The reversal of 39952990 is 9925993.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 39952990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 448866 + ... + 448954.

It is an arithmetic number, because the mean of its divisors is an integer number (969570).

Almost surely, 2^39952990 is an apocalyptic number.

39952990 is an abundant number, since it is smaller than the sum of its proper divisors (53125730).

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

39952990 is a wasteful number, since it uses less digits than its factorization.

39952990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 196830, while the sum is 46.

The square root of 39952990 is about 6320.8377609301. The cubic root of 39952990 is about 341.8611602003.

The spelling of 39952990 in words is "thirty-nine million, nine hundred fifty-two thousand, nine hundred ninety".