39993885 has 16 divisors (see below), whose sum is σ = 71100480. Its totient is φ = 21330000.

The previous prime is 39993883. The next prime is 39993893. The reversal of 39993885 is 58839993.

It is not a de Polignac number, because 39993885 - 2¹ = 39993883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39993881) 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, 147991 + ... + 148260.

It is an arithmetic number, because the mean of its divisors is an integer number (4443780).

Almost surely, 2^39993885 is an apocalyptic number.

It is an amenable number.

39993885 is a deficient number, since it is larger than the sum of its proper divisors (31106595).

39993885 is a wasteful number, since it uses less digits than its factorization.

39993885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296265 (or 296259 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 39993885 is about 6324.0718686618. The cubic root of 39993885 is about 341.9777609423.

The spelling of 39993885 in words is "thirty-nine million, nine hundred ninety-three thousand, eight hundred eighty-five".