87718728 has 16 divisors (see below), whose sum is σ = 219296880. Its totient is φ = 29239568.

The previous prime is 87718723. The next prime is 87718751. The reversal of 87718728 is 82781778.

It is not an unprimeable number, because it can be changed into a prime (87718723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1827450 + ... + 1827497.

It is an arithmetic number, because the mean of its divisors is an integer number (13706055).

Almost surely, 2^87718728 is an apocalyptic number.

It is an amenable number.

87718728 is an abundant number, since it is smaller than the sum of its proper divisors (131578152).

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

87718728 is a wasteful number, since it uses less digits than its factorization.

87718728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3654956 (or 3654952 counting only the distinct ones).

The product of its digits is 351232, while the sum is 48.

The square root of 87718728 is about 9365.8276729822. The cubic root of 87718728 is about 444.3216158540.

The spelling of 87718728 in words is "eighty-seven million, seven hundred eighteen thousand, seven hundred twenty-eight".