39990812 has 6 divisors (see below), whose sum is σ = 69983928. Its totient is φ = 19995404.

The previous prime is 39990799. The next prime is 39990823. The reversal of 39990812 is 21809993.

It is a self number, because there is not a number n which added to its sum of digits gives 39990812.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4998848 + ... + 4998855.

It is an arithmetic number, because the mean of its divisors is an integer number (11663988).

Almost surely, 2^39990812 is an apocalyptic number.

It is an amenable number.

39990812 is a deficient number, since it is larger than the sum of its proper divisors (29993116).

39990812 is a wasteful number, since it uses less digits than its factorization.

39990812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9997707 (or 9997705 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 39990812 is about 6323.8289034413. The cubic root of 39990812 is about 341.9690018985.

The spelling of 39990812 in words is "thirty-nine million, nine hundred ninety thousand, eight hundred twelve".