39394816 has 20 divisors (see below), whose sum is σ = 78713712. Its totient is φ = 19697152.

The previous prime is 39394813. The next prime is 39394829. The reversal of 39394816 is 61849393.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39394813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37960 + ... + 38983.

Almost surely, 2^39394816 is an apocalyptic number.

It is an amenable number.

39394816 is a deficient number, since it is larger than the sum of its proper divisors (39318896).

39394816 is an frugal number, since it uses more digits than its factorization.

39394816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76961 (or 76945 counting only the distinct ones).

The product of its digits is 139968, while the sum is 43.

The square root of 39394816 is about 6276.5289770700. The cubic root of 39394816 is about 340.2616670791.

The spelling of 39394816 in words is "thirty-nine million, three hundred ninety-four thousand, eight hundred sixteen".