7899816 has 32 divisors (see below), whose sum is σ = 19951200. Its totient is φ = 2606400.

The previous prime is 7899811. The next prime is 7899817. The reversal of 7899816 is 6189987.

It is a happy number.

7899816 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (7899811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 795 + ... + 4053.

It is an arithmetic number, because the mean of its divisors is an integer number (623475).

Almost surely, 2^7899816 is an apocalyptic number.

It is an amenable number.

7899816 is an abundant number, since it is smaller than the sum of its proper divisors (12051384).

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

7899816 is a wasteful number, since it uses less digits than its factorization.

7899816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3369 (or 3365 counting only the distinct ones).

The product of its digits is 217728, while the sum is 48.

The square root of 7899816 is about 2810.6611321894. The cubic root of 7899816 is about 199.1616238713.

It can be divided in two parts, 789981 and 6, that added together give a palindrome (789987).

The spelling of 7899816 in words is "seven million, eight hundred ninety-nine thousand, eight hundred sixteen".