7987728 has 40 divisors (see below), whose sum is σ = 23583808. Its totient is φ = 2282112.

The previous prime is 7987717. The next prime is 7987729. The reversal of 7987728 is 8277897.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (7987729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11551 + ... + 12222.

Almost surely, 2^7987728 is an apocalyptic number.

It is an amenable number.

7987728 is an abundant number, since it is smaller than the sum of its proper divisors (15596080).

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

7987728 is a wasteful number, since it uses less digits than its factorization.

7987728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23791 (or 23785 counting only the distinct ones).

The product of its digits is 395136, while the sum is 48.

The square root of 7987728 is about 2826.2568885365. The cubic root of 7987728 is about 199.8976809964.

The spelling of 7987728 in words is "seven million, nine hundred eighty-seven thousand, seven hundred twenty-eight".