3989780 has 12 divisors (see below), whose sum is σ = 8378580. Its totient is φ = 1595904.

The previous prime is 3989761. The next prime is 3989801. The reversal of 3989780 is 879893.

It can be written as a sum of positive squares in 2 ways, for example, as 1817104 + 2172676 = 1348^2 + 1474^2 .

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, 99725 + ... + 99764.

It is an arithmetic number, because the mean of its divisors is an integer number (698215).

Almost surely, 2^3989780 is an apocalyptic number.

It is an amenable number.

3989780 is an abundant number, since it is smaller than the sum of its proper divisors (4388800).

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

3989780 is a wasteful number, since it uses less digits than its factorization.

3989780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199498 (or 199496 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 3989780 is about 1997.4433659055. The cubic root of 3989780 is about 158.6047962369.

The spelling of 3989780 in words is "three million, nine hundred eighty-nine thousand, seven hundred eighty".