7812872 has 16 divisors (see below), whose sum is σ = 14688060. Its totient is φ = 3896064.

The previous prime is 7812851. The next prime is 7812881. The reversal of 7812872 is 2782187.

It can be written as a sum of positive squares in 2 ways, for example, as 7761796 + 51076 = 2786^2 + 226^2 .

It is a super-2 number, since 2×7812872² = 122081937776768, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2588 + ... + 4724.

Almost surely, 2^7812872 is an apocalyptic number.

It is an amenable number.

7812872 is a deficient number, since it is larger than the sum of its proper divisors (6875188).

7812872 is a wasteful number, since it uses less digits than its factorization.

7812872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2600 (or 2596 counting only the distinct ones).

The product of its digits is 12544, while the sum is 35.

The square root of 7812872 is about 2795.1515164656. The cubic root of 7812872 is about 198.4282808497.

The spelling of 7812872 in words is "seven million, eight hundred twelve thousand, eight hundred seventy-two".