7868820 has 48 divisors (see below), whose sum is σ = 22155840. Its totient is φ = 2086656.

The previous prime is 7868813. The next prime is 7868821. The reversal of 7868820 is 288687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7868821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18571 + ... + 18989.

It is an arithmetic number, because the mean of its divisors is an integer number (461580).

Almost surely, 2^7868820 is an apocalyptic number.

It is an amenable number.

7868820 is an abundant number, since it is smaller than the sum of its proper divisors (14287020).

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

7868820 is a wasteful number, since it uses less digits than its factorization.

7868820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744 (or 742 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 7868820 is about 2805.1417076504. The cubic root of 7868820 is about 198.9008032331.

The spelling of 7868820 in words is "seven million, eight hundred sixty-eight thousand, eight hundred twenty".