39721412 has 12 divisors (see below), whose sum is σ = 70294140. Its totient is φ = 19637376.

The previous prime is 39721411. The next prime is 39721441. The reversal of 39721412 is 21412793.

It can be written as a sum of positive squares in 2 ways, for example, as 9096256 + 30625156 = 3016^2 + 5534^2 .

It is not an unprimeable number, because it can be changed into a prime (39721411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55433 + ... + 56144.

It is an arithmetic number, because the mean of its divisors is an integer number (5857845).

Almost surely, 2^39721412 is an apocalyptic number.

It is an amenable number.

39721412 is a deficient number, since it is larger than the sum of its proper divisors (30572728).

39721412 is a wasteful number, since it uses less digits than its factorization.

39721412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111670 (or 111668 counting only the distinct ones).

The product of its digits is 3024, while the sum is 29.

The square root of 39721412 is about 6302.4925228040. The cubic root of 39721412 is about 341.1993742965.

The spelling of 39721412 in words is "thirty-nine million, seven hundred twenty-one thousand, four hundred twelve".