3985880 has 32 divisors (see below), whose sum is σ = 9026640. Its totient is φ = 1584000.

The previous prime is 3985879. The next prime is 3985889. The reversal of 3985880 is 885893.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3985889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9842 + ... + 10238.

Almost surely, 2^3985880 is an apocalyptic number.

It is an amenable number.

3985880 is an abundant number, since it is smaller than the sum of its proper divisors (5040760).

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

3985880 is a wasteful number, since it uses less digits than its factorization.

3985880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659 (or 655 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 3985880 is about 1996.4668792645. The cubic root of 3985880 is about 158.5531007916.

The spelling of 3985880 in words is "three million, nine hundred eighty-five thousand, eight hundred eighty".