7899140 has 24 divisors (see below), whose sum is σ = 16642752. Its totient is φ = 3149280.

The previous prime is 7899137. The next prime is 7899161. The reversal of 7899140 is 419987.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 7899094 and 7899103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9335 + ... + 10145.

It is an arithmetic number, because the mean of its divisors is an integer number (693448).

Almost surely, 2^7899140 is an apocalyptic number.

It is an amenable number.

7899140 is an abundant number, since it is smaller than the sum of its proper divisors (8743612).

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

7899140 is a wasteful number, since it uses less digits than its factorization.

7899140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307 (or 1305 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 7899140 is about 2810.5408732128. The cubic root of 7899140 is about 199.1559428487.

The spelling of 7899140 in words is "seven million, eight hundred ninety-nine thousand, one hundred forty".