7128816 has 20 divisors (see below), whose sum is σ = 18416232. Its totient is φ = 2376256.

The previous prime is 7128799. The next prime is 7128817. The reversal of 7128816 is 6188217.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7128817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74211 + ... + 74306.

Almost surely, 2^7128816 is an apocalyptic number.

It is an amenable number.

7128816 is an abundant number, since it is smaller than the sum of its proper divisors (11287416).

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

7128816 is a wasteful number, since it uses less digits than its factorization.

7128816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148528 (or 148522 counting only the distinct ones).

The product of its digits is 5376, while the sum is 33.

The square root of 7128816 is about 2669.9842696166. The cubic root of 7128816 is about 192.4594033692.

The spelling of 7128816 in words is "seven million, one hundred twenty-eight thousand, eight hundred sixteen".