39142972 has 24 divisors (see below), whose sum is σ = 75075840. Its totient is φ = 17709360.

The previous prime is 39142951. The next prime is 39142981. The reversal of 39142972 is 27924193.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8029 + ... + 11947.

It is an arithmetic number, because the mean of its divisors is an integer number (3128160).

Almost surely, 2^39142972 is an apocalyptic number.

It is an amenable number.

39142972 is a deficient number, since it is larger than the sum of its proper divisors (35932868).

39142972 is a wasteful number, since it uses less digits than its factorization.

39142972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4161 (or 4159 counting only the distinct ones).

The product of its digits is 27216, while the sum is 37.

The square root of 39142972 is about 6256.4344478305. The cubic root of 39142972 is about 339.5350391816.

It can be divided in two parts, 3914 and 2972, that added together give a palindrome (6886).

The spelling of 39142972 in words is "thirty-nine million, one hundred forty-two thousand, nine hundred seventy-two".