3980018 has 16 divisors (see below), whose sum is σ = 7058880. Its totient is φ = 1646736.

The previous prime is 3980017. The next prime is 3980027. The reversal of 3980018 is 8100893.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3980017) 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, 4496 + ... + 5307.

It is an arithmetic number, because the mean of its divisors is an integer number (441180).

Almost surely, 2^3980018 is an apocalyptic number.

3980018 is a deficient number, since it is larger than the sum of its proper divisors (3078862).

3980018 is a wasteful number, since it uses less digits than its factorization.

3980018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9841.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 3980018 is about 1994.9982456133. The cubic root of 3980018 is about 158.4753350880.

The spelling of 3980018 in words is "three million, nine hundred eighty thousand, eighteen".