39940992 has 256 divisors, whose sum is σ = 146227200. Its totient is φ = 10450944.

The previous prime is 39940981. The next prime is 39940997. The reversal of 39940992 is 29904993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39940997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 314433 + ... + 314559.

It is an arithmetic number, because the mean of its divisors is an integer number (571200).

Almost surely, 2^39940992 is an apocalyptic number.

39940992 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 39940992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73113600).

39940992 is an abundant number, since it is smaller than the sum of its proper divisors (106286208).

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

39940992 is a wasteful number, since it uses less digits than its factorization.

39940992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The square root of 39940992 is about 6319.8886066133. Note that the first 3 decimals coincide. The cubic root of 39940992 is about 341.8269361381.

The spelling of 39940992 in words is "thirty-nine million, nine hundred forty thousand, nine hundred ninety-two".