3920724 has 30 divisors (see below), whose sum is σ = 10250394. Its totient is φ = 1306800.

The previous prime is 3920689. The next prime is 3920729. The reversal of 3920724 is 4270293.

It can be written as a sum of positive squares in only one way, i.e., 3920400 + 324 = 1980^2 + 18^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3920729) 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 9 ways as a sum of consecutive naturals, for example, 5727 + ... + 6374.

Almost surely, 2^3920724 is an apocalyptic number.

It is an amenable number.

3920724 is an abundant number, since it is smaller than the sum of its proper divisors (6329670).

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

3920724 is a wasteful number, since it uses less digits than its factorization.

3920724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12117 (or 12106 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 3920724 is about 1980.0818164914. The cubic root of 3920724 is about 157.6844098487.

The spelling of 3920724 in words is "three million, nine hundred twenty thousand, seven hundred twenty-four".