8161872 has 40 divisors (see below), whose sum is σ = 22004544. Its totient is φ = 2601984.

The previous prime is 8161859. The next prime is 8161889. The reversal of 8161872 is 2781618.

It is a happy number.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2593 + ... + 4800.

Almost surely, 2^8161872 is an apocalyptic number.

It is an amenable number.

8161872 is an abundant number, since it is smaller than the sum of its proper divisors (13842672).

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

8161872 is a wasteful number, since it uses less digits than its factorization.

8161872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7427 (or 7421 counting only the distinct ones).

The product of its digits is 5376, while the sum is 33.

The square root of 8161872 is about 2856.8990181664. The cubic root of 8161872 is about 201.3399361410.

The spelling of 8161872 in words is "eight million, one hundred sixty-one thousand, eight hundred seventy-two".