39968745 has 16 divisors (see below), whose sum is σ = 64033152. Its totient is φ = 21288960.

The previous prime is 39968737. The next prime is 39968749. The reversal of 39968745 is 54786993.

It is not a de Polignac number, because 39968745 - 2³ = 39968737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39968749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16140 + ... + 18450.

It is an arithmetic number, because the mean of its divisors is an integer number (4002072).

Almost surely, 2^39968745 is an apocalyptic number.

It is an amenable number.

39968745 is a deficient number, since it is larger than the sum of its proper divisors (24064407).

39968745 is a wasteful number, since it uses less digits than its factorization.

39968745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3472.

The product of its digits is 1632960, while the sum is 51.

The square root of 39968745 is about 6322.0839127617. The cubic root of 39968745 is about 341.9060906278.

The spelling of 39968745 in words is "thirty-nine million, nine hundred sixty-eight thousand, seven hundred forty-five".