39964992 has 56 divisors (see below), whose sum is σ = 106472736. Its totient is φ = 13229568.

The previous prime is 39964949. The next prime is 39964997. The reversal of 39964992 is 29946993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39964997) 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, 30658 + ... + 31934.

Almost surely, 2^39964992 is an apocalyptic number.

39964992 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 39964992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53236368).

39964992 is an abundant number, since it is smaller than the sum of its proper divisors (66507744).

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

39964992 is a wasteful number, since it uses less digits than its factorization.

39964992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455 (or 1445 counting only the distinct ones).

The product of its digits is 944784, while the sum is 51.

The square root of 39964992 is about 6321.7870891070. The cubic root of 39964992 is about 341.8953888180.

The spelling of 39964992 in words is "thirty-nine million, nine hundred sixty-four thousand, nine hundred ninety-two".