7816728 has 16 divisors (see below), whose sum is σ = 19541880. Its totient is φ = 2605568.

The previous prime is 7816727. The next prime is 7816729. The reversal of 7816728 is 8276187.

It is an interprime number because it is at equal distance from previous prime (7816727) and next prime (7816729).

It is a super-4 number, since 4×7816728⁴ (a number of 29 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7816727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162825 + ... + 162872.

Almost surely, 2^7816728 is an apocalyptic number.

It is an amenable number.

7816728 is an abundant number, since it is smaller than the sum of its proper divisors (11725152).

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

7816728 is a wasteful number, since it uses less digits than its factorization.

7816728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325706 (or 325702 counting only the distinct ones).

The product of its digits is 37632, while the sum is 39.

The square root of 7816728 is about 2795.8411972070. The cubic root of 7816728 is about 198.4609198762.

The spelling of 7816728 in words is "seven million, eight hundred sixteen thousand, seven hundred twenty-eight".