39989142 has 24 divisors (see below), whose sum is σ = 87062040. Its totient is φ = 13265280.

The previous prime is 39989141. The next prime is 39989143. The reversal of 39989142 is 24198993.

39989142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (39989141) and next prime (39989143).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39989141) 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 11 ways as a sum of consecutive naturals, for example, 1467 + ... + 9062.

It is an arithmetic number, because the mean of its divisors is an integer number (3627585).

Almost surely, 2^39989142 is an apocalyptic number.

39989142 is an abundant number, since it is smaller than the sum of its proper divisors (47072898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39989142 is a wasteful number, since it uses less digits than its factorization.

39989142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10748 (or 10745 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 39989142 is about 6323.6968618048. The cubic root of 39989142 is about 341.9642416702.

The spelling of 39989142 in words is "thirty-nine million, nine hundred eighty-nine thousand, one hundred forty-two".