3972238 has 8 divisors (see below), whose sum is σ = 6217488. Its totient is φ = 1899744.

The previous prime is 3972233. The next prime is 3972251. The reversal of 3972238 is 8322793.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3972233) 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, 43131 + ... + 43222.

It is an arithmetic number, because the mean of its divisors is an integer number (777186).

Almost surely, 2^3972238 is an apocalyptic number.

3972238 is a deficient number, since it is larger than the sum of its proper divisors (2245250).

3972238 is a wasteful number, since it uses less digits than its factorization.

3972238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86378.

The product of its digits is 18144, while the sum is 34.

The square root of 3972238 is about 1993.0474153918. The cubic root of 3972238 is about 158.3720070504.

The spelling of 3972238 in words is "three million, nine hundred seventy-two thousand, two hundred thirty-eight".