3981318 has 32 divisors (see below), whose sum is σ = 8760960. Its totient is φ = 1196160.

The previous prime is 3981301. The next prime is 3981331. The reversal of 3981318 is 8131893.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11646 + ... + 11982.

It is an arithmetic number, because the mean of its divisors is an integer number (273780).

Almost surely, 2^3981318 is an apocalyptic number.

3981318 is an abundant number, since it is smaller than the sum of its proper divisors (4779642).

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

3981318 is a wasteful number, since it uses less digits than its factorization.

3981318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532.

The product of its digits is 5184, while the sum is 33.

The square root of 3981318 is about 1995.3240338351. The cubic root of 3981318 is about 158.4925875651.

The spelling of 3981318 in words is "three million, nine hundred eighty-one thousand, three hundred eighteen".