3990580 has 72 divisors (see below), whose sum is σ = 9853704. Its totient is φ = 1351680.

The previous prime is 3990541. The next prime is 3990593. The reversal of 3990580 is 850993.

3990580 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 736164 + 3254416 = 858^2 + 1804^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41092 + ... + 41188.

It is an arithmetic number, because the mean of its divisors is an integer number (136857).

Almost surely, 2^3990580 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 3990580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4926852).

3990580 is an abundant number, since it is smaller than the sum of its proper divisors (5863124).

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

3990580 is a wasteful number, since it uses less digits than its factorization.

3990580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 3990580 is about 1997.6436118587. The cubic root of 3990580 is about 158.6153962664.

3990580 divided by its sum of digits (34) gives a triangular number (117370 = T₄₈₄).

The spelling of 3990580 in words is "three million, nine hundred ninety thousand, five hundred eighty".