3985780 has 12 divisors (see below), whose sum is σ = 8370180. Its totient is φ = 1594304.

The previous prime is 3985777. The next prime is 3985829. The reversal of 3985780 is 875893.

It can be written as a sum of positive squares in 2 ways, for example, as 1354896 + 2630884 = 1164^2 + 1622^2 .

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, 99625 + ... + 99664.

It is an arithmetic number, because the mean of its divisors is an integer number (697515).

Almost surely, 2^3985780 is an apocalyptic number.

It is an amenable number.

3985780 is an abundant number, since it is smaller than the sum of its proper divisors (4384400).

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

3985780 is a wasteful number, since it uses less digits than its factorization.

3985780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199298 (or 199296 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 3985780 is about 1996.4418348652. The cubic root of 3985780 is about 158.5517748241.

The spelling of 3985780 in words is "three million, nine hundred eighty-five thousand, seven hundred eighty".