7912728 has 40 divisors (see below), whose sum is σ = 22164780. Its totient is φ = 2637360.

The previous prime is 7912717. The next prime is 7912733. The reversal of 7912728 is 8272197.

7912728 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×7912728² = 125222528803968, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 7912692 and 7912701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5458 + ... + 6753.

Almost surely, 2^7912728 is an apocalyptic number.

It is an amenable number.

7912728 is an abundant number, since it is smaller than the sum of its proper divisors (14252052).

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

7912728 is a wasteful number, since it uses less digits than its factorization.

7912728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12229 (or 12216 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 7912728 is about 2812.9571628448. The cubic root of 7912728 is about 199.2700726042.

The spelling of 7912728 in words is "seven million, nine hundred twelve thousand, seven hundred twenty-eight".