7806816 has 36 divisors (see below), whose sum is σ = 22201452. Its totient is φ = 2602176.

The previous prime is 7806811. The next prime is 7806833. The reversal of 7806816 is 6186087.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7806811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13266 + ... + 13841.

It is an arithmetic number, because the mean of its divisors is an integer number (616707).

Almost surely, 2^7806816 is an apocalyptic number.

It is an amenable number.

7806816 is an abundant number, since it is smaller than the sum of its proper divisors (14394636).

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

7806816 is a wasteful number, since it uses less digits than its factorization.

7806816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27123 (or 27112 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 7806816 is about 2794.0680020357. The cubic root of 7806816 is about 198.3769982872.

The spelling of 7806816 in words is "seven million, eight hundred six thousand, eight hundred sixteen".