39988285 has 16 divisors (see below), whose sum is σ = 48787200. Its totient is φ = 31461696.

The previous prime is 39988279. The next prime is 39988297. The reversal of 39988285 is 58288993.

It is a happy number.

It is a 5-Lehmer number, since φ(39988285) divides (39988285-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 39988285 - 2¹³ = 39980093 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130102 + ... + 130408.

It is an arithmetic number, because the mean of its divisors is an integer number (3049200).

Almost surely, 2^39988285 is an apocalyptic number.

It is an amenable number.

39988285 is a deficient number, since it is larger than the sum of its proper divisors (8798915).

39988285 is a wasteful number, since it uses less digits than its factorization.

39988285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660.

The product of its digits is 1244160, while the sum is 52.

The square root of 39988285 is about 6323.6291004454. The cubic root of 39988285 is about 341.9617987950.

The spelling of 39988285 in words is "thirty-nine million, nine hundred eighty-eight thousand, two hundred eighty-five".