39992020 has 24 divisors (see below), whose sum is σ = 84205800. Its totient is φ = 15954432.

The previous prime is 39992011. The next prime is 39992023. The reversal of 39992020 is 2029993.

It can be written as a sum of positive squares in 4 ways, for example, as 15350724 + 24641296 = 3918^2 + 4964^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39992023) 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, 5736 + ... + 10624.

It is an arithmetic number, because the mean of its divisors is an integer number (3508575).

Almost surely, 2^39992020 is an apocalyptic number.

It is an amenable number.

39992020 is an abundant number, since it is smaller than the sum of its proper divisors (44213780).

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

39992020 is a wasteful number, since it uses less digits than its factorization.

39992020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5307 (or 5305 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 39992020 is about 6323.9244144756. The cubic root of 39992020 is about 341.9724451427.

The spelling of 39992020 in words is "thirty-nine million, nine hundred ninety-two thousand, twenty".