3902720 has 36 divisors (see below), whose sum is σ = 9351300. Its totient is φ = 1560576.

The previous prime is 3902713. The next prime is 3902747. The reversal of 3902720 is 272093.

It can be written as a sum of positive squares in 2 ways, for example, as 861184 + 3041536 = 928^2 + 1744^2 .

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245 + ... + 2804.

Almost surely, 2^3902720 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 3902720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4675650).

3902720 is an abundant number, since it is smaller than the sum of its proper divisors (5448580).

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

3902720 is an equidigital number, since it uses as much as digits as its factorization.

3902720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3070 (or 3056 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 3902720 is about 1975.5303085501. The cubic root of 3902720 is about 157.4426767122.

The spelling of 3902720 in words is "three million, nine hundred two thousand, seven hundred twenty".