7975728 has 60 divisors (see below), whose sum is σ = 22590568. Its totient is φ = 2626560.

The previous prime is 7975717. The next prime is 7975739. The reversal of 7975728 is 8275797.

7975728 is a `hidden beast` number, since 79 + 7 + 572 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (7975717) and next prime (7975739).

It is a super-2 number, since 2×7975728² = 127224474259968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13683 + ... + 14253.

Almost surely, 2^7975728 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 7975728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11295284).

7975728 is an abundant number, since it is smaller than the sum of its proper divisors (14614840).

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

7975728 is a wasteful number, since it uses less digits than its factorization.

7975728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682 (or 673 counting only the distinct ones).

The product of its digits is 246960, while the sum is 45.

The square root of 7975728 is about 2824.1331413374. The cubic root of 7975728 is about 199.7975284288.

The spelling of 7975728 in words is "seven million, nine hundred seventy-five thousand, seven hundred twenty-eight".