39720252 has 96 divisors (see below), whose sum is σ = 110638080. Its totient is φ = 10932480.

The previous prime is 39720179. The next prime is 39720257. The reversal of 39720252 is 25202793.

It is a happy number.

39720252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39720257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135418 + ... + 135710.

It is an arithmetic number, because the mean of its divisors is an integer number (1152480).

Almost surely, 2^39720252 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39720252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55319040).

39720252 is an abundant number, since it is smaller than the sum of its proper divisors (70917828).

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

39720252 is a wasteful number, since it uses less digits than its factorization.

39720252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403 (or 401 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 39720252 is about 6302.4004950495. The cubic root of 39720252 is about 341.1960528710.

The spelling of 39720252 in words is "thirty-nine million, seven hundred twenty thousand, two hundred fifty-two".