8172944 has 20 divisors (see below), whose sum is σ = 17053596. Its totient is φ = 3772032.

The previous prime is 8172943. The next prime is 8172953. The reversal of 8172944 is 4492718.

It can be written as a sum of positive squares in 2 ways, for example, as 4787344 + 3385600 = 2188^2 + 1840^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8172943) 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, 19439 + ... + 19854.

Almost surely, 2^8172944 is an apocalyptic number.

It is an amenable number.

8172944 is an abundant number, since it is smaller than the sum of its proper divisors (8880652).

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

8172944 is a wasteful number, since it uses less digits than its factorization.

8172944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39314 (or 39308 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 8172944 is about 2858.8361268180. The cubic root of 8172944 is about 201.4309376706.

The spelling of 8172944 in words is "eight million, one hundred seventy-two thousand, nine hundred forty-four".