3940018 has 8 divisors (see below), whose sum is σ = 6054300. Its totient is φ = 1921920.

The previous prime is 3940009. The next prime is 3940021. The reversal of 3940018 is 8100493.

It can be written as a sum of positive squares in 2 ways, for example, as 2913849 + 1026169 = 1707^2 + 1013^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 3939974 and 3940001.

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, 23943 + ... + 24106.

Almost surely, 2^3940018 is an apocalyptic number.

3940018 is a deficient number, since it is larger than the sum of its proper divisors (2114282).

3940018 is a wasteful number, since it uses less digits than its factorization.

3940018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48092.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 3940018 is about 1984.9478582572. The cubic root of 3940018 is about 157.9426432840.

The spelling of 3940018 in words is "three million, nine hundred forty thousand, eighteen".