39936891 has 16 divisors (see below), whose sum is σ = 54286848. Its totient is φ = 26109600.

The previous prime is 39936863. The next prime is 39936943. The reversal of 39936891 is 19863993.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-39936891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39936891.

It is not an unprimeable number, because it can be changed into a prime (39936811) 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, 86401 + ... + 86861.

It is an arithmetic number, because the mean of its divisors is an integer number (3392928).

Almost surely, 2^39936891 is an apocalyptic number.

39936891 is a deficient number, since it is larger than the sum of its proper divisors (14349957).

39936891 is a wasteful number, since it uses less digits than its factorization.

39936891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962.

The product of its digits is 314928, while the sum is 48.

The square root of 39936891 is about 6319.5641463633. The cubic root of 39936891 is about 341.8152365434.

The spelling of 39936891 in words is "thirty-nine million, nine hundred thirty-six thousand, eight hundred ninety-one".