39213992 has 8 divisors (see below), whose sum is σ = 73526250. Its totient is φ = 19606992.

The previous prime is 39213991. The next prime is 39213997. The reversal of 39213992 is 29931293.

39213992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 26152996 + 13060996 = 5114^2 + 3614^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (39213991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2450867 + ... + 2450882.

Almost surely, 2^39213992 is an apocalyptic number.

It is an amenable number.

39213992 is a deficient number, since it is larger than the sum of its proper divisors (34312258).

39213992 is a wasteful number, since it uses less digits than its factorization.

39213992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4901755 (or 4901751 counting only the distinct ones).

The product of its digits is 26244, while the sum is 38.

The square root of 39213992 is about 6262.1076324190. The cubic root of 39213992 is about 339.7402629900.

The spelling of 39213992 in words is "thirty-nine million, two hundred thirteen thousand, nine hundred ninety-two".