7128916 has 24 divisors (see below), whose sum is σ = 13536936. Its totient is φ = 3271680.

The previous prime is 7128907. The next prime is 7128931. The reversal of 7128916 is 6198217.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 348100 + 6780816 = 590^2 + 2604^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 1510 + ... + 4066.

It is an arithmetic number, because the mean of its divisors is an integer number (564039).

Almost surely, 2^7128916 is an apocalyptic number.

It is an amenable number.

7128916 is a deficient number, since it is larger than the sum of its proper divisors (6408020).

7128916 is a wasteful number, since it uses less digits than its factorization.

7128916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2619 (or 2617 counting only the distinct ones).

The product of its digits is 6048, while the sum is 34.

The square root of 7128916 is about 2670.0029962530. The cubic root of 7128916 is about 192.4603032779.

It can be divided in two parts, 71289 and 16, that multiplied together give a square (1140624 = 1068²).

The spelling of 7128916 in words is "seven million, one hundred twenty-eight thousand, nine hundred sixteen".