39978112 has 64 divisors (see below), whose sum is σ = 83280960. Its totient is φ = 19102720.

The previous prime is 39978097. The next prime is 39978121. The reversal of 39978112 is 21187993.

It is a tau number, because it is divible by the number of its divisors (64).

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, 481623 + ... + 481705.

It is an arithmetic number, because the mean of its divisors is an integer number (1301265).

Almost surely, 2^39978112 is an apocalyptic number.

39978112 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 39978112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41640480).

39978112 is an abundant number, since it is smaller than the sum of its proper divisors (43302848).

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

39978112 is an equidigital number, since it uses as much as digits as its factorization.

39978112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 209 counting only the distinct ones).

The product of its digits is 27216, while the sum is 40.

The square root of 39978112 is about 6322.8246852178. The cubic root of 39978112 is about 341.9327980312.

The spelling of 39978112 in words is "thirty-nine million, nine hundred seventy-eight thousand, one hundred twelve".