7816816 has 40 divisors (see below), whose sum is σ = 17570304. Its totient is φ = 3299520.

The previous prime is 7816807. The next prime is 7816843. The reversal of 7816816 is 6186187.

It is a super-2 number, since 2×7816816² = 122205224755712, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7461 + ... + 8443.

Almost surely, 2^7816816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7816816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8785152).

7816816 is an abundant number, since it is smaller than the sum of its proper divisors (9753488).

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

7816816 is a wasteful number, since it uses less digits than its factorization.

7816816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069 (or 1063 counting only the distinct ones).

The product of its digits is 16128, while the sum is 37.

The square root of 7816816 is about 2795.8569348234. The cubic root of 7816816 is about 198.4616646250.

The spelling of 7816816 in words is "seven million, eight hundred sixteen thousand, eight hundred sixteen".