3899780 has 12 divisors (see below), whose sum is σ = 8189580. Its totient is φ = 1559904.

The previous prime is 3899773. The next prime is 3899801. The reversal of 3899780 is 879983.

It can be written as a sum of positive squares in 2 ways, for example, as 565504 + 3334276 = 752^2 + 1826^2 .

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, 97475 + ... + 97514.

It is an arithmetic number, because the mean of its divisors is an integer number (682465).

Almost surely, 2^3899780 is an apocalyptic number.

It is an amenable number.

3899780 is an abundant number, since it is smaller than the sum of its proper divisors (4289800).

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

3899780 is a wasteful number, since it uses less digits than its factorization.

3899780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194998 (or 194996 counting only the distinct ones).

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

The square root of 3899780 is about 1974.7860643624. The cubic root of 3899780 is about 157.4031318348.

The spelling of 3899780 in words is "three million, eight hundred ninety-nine thousand, seven hundred eighty".