39891952 has 20 divisors (see below), whose sum is σ = 77403280. Its totient is φ = 19916928.

The previous prime is 39891949. The next prime is 39891953. The reversal of 39891952 is 25919893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39891953) 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, 13348 + ... + 16060.

It is an arithmetic number, because the mean of its divisors is an integer number (3870164).

Almost surely, 2^39891952 is an apocalyptic number.

It is an amenable number.

39891952 is a deficient number, since it is larger than the sum of its proper divisors (37511328).

39891952 is a wasteful number, since it uses less digits than its factorization.

39891952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3640 (or 3634 counting only the distinct ones).

The product of its digits is 174960, while the sum is 46.

The square root of 39891952 is about 6316.0075997421. The cubic root of 39891952 is about 341.6869791876.

The spelling of 39891952 in words is "thirty-nine million, eight hundred ninety-one thousand, nine hundred fifty-two".