3972387 has 8 divisors (see below), whose sum is σ = 5575360. Its totient is φ = 2508840.

The previous prime is 3972377. The next prime is 3972413. The reversal of 3972387 is 7832793.

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

It is not a de Polignac number, because 3972387 - 2¹¹ = 3970339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3972377) 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, 34789 + ... + 34902.

It is an arithmetic number, because the mean of its divisors is an integer number (696920).

Almost surely, 2^3972387 is an apocalyptic number.

3972387 is a deficient number, since it is larger than the sum of its proper divisors (1602973).

3972387 is a wasteful number, since it uses less digits than its factorization.

3972387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69713.

The product of its digits is 63504, while the sum is 39.

The square root of 3972387 is about 1993.0847949849. The cubic root of 3972387 is about 158.3739872216.

The spelling of 3972387 in words is "three million, nine hundred seventy-two thousand, three hundred eighty-seven".