3998972 has 12 divisors (see below), whose sum is σ = 7013496. Its totient is φ = 1995120.

The previous prime is 3998971. The next prime is 3998983. The reversal of 3998972 is 2798993.

3998972 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3998971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1847 + ... + 3377.

It is an arithmetic number, because the mean of its divisors is an integer number (584458).

Almost surely, 2^3998972 is an apocalyptic number.

It is an amenable number.

3998972 is a deficient number, since it is larger than the sum of its proper divisors (3014524).

3998972 is a wasteful number, since it uses less digits than its factorization.

3998972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188 (or 2186 counting only the distinct ones).

The product of its digits is 244944, while the sum is 47.

The square root of 3998972 is about 1999.7429834856. The cubic root of 3998972 is about 158.7265052960.

The spelling of 3998972 in words is "three million, nine hundred ninety-eight thousand, nine hundred seventy-two".