39988887 has 8 divisors (see below), whose sum is σ = 53522304. Its totient is φ = 26557368.

The previous prime is 39988867. The next prime is 39988903. The reversal of 39988887 is 78888993.

39988887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 39988887 - 2⁷ = 39988759 is a prime.

It is a super-2 number, since 2×39988887² = 3198222166997538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 39988887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39988807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24553 + ... + 26130.

It is an arithmetic number, because the mean of its divisors is an integer number (6690288).

Almost surely, 2^39988887 is an apocalyptic number.

39988887 is a deficient number, since it is larger than the sum of its proper divisors (13533417).

39988887 is a wasteful number, since it uses less digits than its factorization.

39988887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50949.

The product of its digits is 6967296, while the sum is 60.

The square root of 39988887 is about 6323.6766995159. The cubic root of 39988887 is about 341.9635147973.

The spelling of 39988887 in words is "thirty-nine million, nine hundred eighty-eight thousand, eight hundred eighty-seven".