3972918 has 16 divisors (see below), whose sum is σ = 7965936. Its totient is φ = 1320960.

The previous prime is 3972911. The next prime is 3972923. The reversal of 3972918 is 8192793.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3972911) 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, 3330 + ... + 4362.

It is an arithmetic number, because the mean of its divisors is an integer number (497871).

Almost surely, 2^3972918 is an apocalyptic number.

3972918 is an abundant number, since it is smaller than the sum of its proper divisors (3993018).

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

3972918 is a wasteful number, since it uses less digits than its factorization.

3972918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1679.

The product of its digits is 27216, while the sum is 39.

The square root of 3972918 is about 1993.2180011228. The cubic root of 3972918 is about 158.3810436707.

The spelling of 3972918 in words is "three million, nine hundred seventy-two thousand, nine hundred eighteen".