3972478 has 8 divisors (see below), whose sum is σ = 6164280. Its totient is φ = 1917720.

The previous prime is 3972467. The next prime is 3972499. The reversal of 3972478 is 8742793.

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

It is a self number, because there is not a number n which added to its sum of digits gives 3972478.

It is a congruent number.

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, 34188 + ... + 34303.

It is an arithmetic number, because the mean of its divisors is an integer number (770535).

Almost surely, 2^3972478 is an apocalyptic number.

3972478 is a deficient number, since it is larger than the sum of its proper divisors (2191802).

3972478 is a wasteful number, since it uses less digits than its factorization.

3972478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68522.

The product of its digits is 84672, while the sum is 40.

The square root of 3972478 is about 1993.1076237875. The cubic root of 3972478 is about 158.3751965635.

The spelling of 3972478 in words is "three million, nine hundred seventy-two thousand, four hundred seventy-eight".