7873812 has 18 divisors (see below), whose sum is σ = 19903338. Its totient is φ = 2624592.

The previous prime is 7873799. The next prime is 7873823. The reversal of 7873812 is 2183787.

It can be written as a sum of positive squares in only one way, i.e., 5171076 + 2702736 = 2274^2 + 1644^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×7873812² = 123993830822688, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 218717 = 7873812 / (7 + 8 + 7 + 3 + 8 + 1 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 109323 + ... + 109394.

It is an arithmetic number, because the mean of its divisors is an integer number (1105741).

Almost surely, 2^7873812 is an apocalyptic number.

It is an amenable number.

7873812 is an abundant number, since it is smaller than the sum of its proper divisors (12029526).

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

7873812 is a wasteful number, since it uses less digits than its factorization.

7873812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218727 (or 218722 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 7873812 is about 2806.0313611932. The cubic root of 7873812 is about 198.9428554050.

The spelling of 7873812 in words is "seven million, eight hundred seventy-three thousand, eight hundred twelve".