3972726 has 40 divisors (see below), whose sum is σ = 9016920. Its totient is φ = 1307232.

The previous prime is 3972697. The next prime is 3972737. The reversal of 3972726 is 6272793.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 22105 + ... + 22283.

It is an arithmetic number, because the mean of its divisors is an integer number (225423).

Almost surely, 2^3972726 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3972726, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4508460).

3972726 is an abundant number, since it is smaller than the sum of its proper divisors (5044194).

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

3972726 is a wasteful number, since it uses less digits than its factorization.

3972726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330 (or 321 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The square root of 3972726 is about 1993.1698372191. The cubic root of 3972726 is about 158.3784922588.

The spelling of 3972726 in words is "three million, nine hundred seventy-two thousand, seven hundred twenty-six".