39997632 has 56 divisors (see below), whose sum is σ = 108429552. Its totient is φ = 13004800.

The previous prime is 39997631. The next prime is 39997687. The reversal of 39997632 is 23679993.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (39997631) 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, 5332 + ... + 10412.

It is an arithmetic number, because the mean of its divisors is an integer number (1936242).

Almost surely, 2^39997632 is an apocalyptic number.

39997632 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39997632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54214776).

39997632 is an abundant number, since it is smaller than the sum of its proper divisors (68431920).

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

39997632 is a wasteful number, since it uses less digits than its factorization.

39997632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5137 (or 5127 counting only the distinct ones).

The product of its digits is 551124, while the sum is 48.

The square root of 39997632 is about 6324.3681107285. The cubic root of 39997632 is about 341.9884404971.

The spelling of 39997632 in words is "thirty-nine million, nine hundred ninety-seven thousand, six hundred thirty-two".