39972328 has 16 divisors (see below), whose sum is σ = 81761760. Its totient is φ = 18169200.

The previous prime is 39972319. The next prime is 39972329. The reversal of 39972328 is 82327993.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (39972329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227028 + ... + 227203.

It is an arithmetic number, because the mean of its divisors is an integer number (5110110).

Almost surely, 2^39972328 is an apocalyptic number.

It is an amenable number.

39972328 is an abundant number, since it is smaller than the sum of its proper divisors (41789432).

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

39972328 is a wasteful number, since it uses less digits than its factorization.

39972328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454248 (or 454244 counting only the distinct ones).

The product of its digits is 163296, while the sum is 43.

The square root of 39972328 is about 6322.3672781641. The cubic root of 39972328 is about 341.9163070516.

It can be divided in two parts, 399 and 72328, that added together give a palindrome (72727).

The spelling of 39972328 in words is "thirty-nine million, nine hundred seventy-two thousand, three hundred twenty-eight".