7899620 has 12 divisors (see below), whose sum is σ = 16589244. Its totient is φ = 3159840.

The previous prime is 7899607. The next prime is 7899623. The reversal of 7899620 is 269987.

It can be written as a sum of positive squares in 2 ways, for example, as 5607424 + 2292196 = 2368^2 + 1514^2 .

It is a super-2 number, since 2×7899620² = 124807992288800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (7899623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197471 + ... + 197510.

It is an arithmetic number, because the mean of its divisors is an integer number (1382437).

Almost surely, 2^7899620 is an apocalyptic number.

It is an amenable number.

7899620 is an abundant number, since it is smaller than the sum of its proper divisors (8689624).

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

7899620 is a wasteful number, since it uses less digits than its factorization.

7899620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394990 (or 394988 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 7899620 is about 2810.6262647318. The cubic root of 7899620 is about 199.1599767443.

The spelling of 7899620 in words is "seven million, eight hundred ninety-nine thousand, six hundred twenty".