39988999 has 8 divisors (see below), whose sum is σ = 41636160. Its totient is φ = 38359776.

The previous prime is 39988951. The next prime is 39989009. The reversal of 39988999 is 99988993.

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

It is a cyclic number.

It is not a de Polignac number, because 39988999 - 2¹¹ = 39986951 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39988999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39988909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162 + ... + 8944.

It is an arithmetic number, because the mean of its divisors is an integer number (5204520).

Almost surely, 2^39988999 is an apocalyptic number.

39988999 is a deficient number, since it is larger than the sum of its proper divisors (1647161).

39988999 is a wasteful number, since it uses less digits than its factorization.

39988999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8969.

The product of its digits is 11337408, while the sum is 64.

The square root of 39988999 is about 6323.6855551174. The cubic root of 39988999 is about 341.9638340517.

It can be divided in two parts, 399 and 88999, that added together give a palindrome (89398).

The spelling of 39988999 in words is "thirty-nine million, nine hundred eighty-eight thousand, nine hundred ninety-nine".