8215872 has 56 divisors (see below), whose sum is σ = 24847296. Its totient is φ = 2347008.

The previous prime is 8215861. The next prime is 8215877. The reversal of 8215872 is 2785128.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8215877) 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, 1713 + ... + 4400.

Almost surely, 2^8215872 is an apocalyptic number.

It is an amenable number.

8215872 is an abundant number, since it is smaller than the sum of its proper divisors (16631424).

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

8215872 is a wasteful number, since it uses less digits than its factorization.

8215872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6135 (or 6125 counting only the distinct ones).

The product of its digits is 8960, while the sum is 33.

The square root of 8215872 is about 2866.3342442918. The cubic root of 8215872 is about 201.7829908168.

The spelling of 8215872 in words is "eight million, two hundred fifteen thousand, eight hundred seventy-two".