87708228 has 12 divisors (see below), whose sum is σ = 204652560. Its totient is φ = 29236072.

The previous prime is 87708197. The next prime is 87708239. The reversal of 87708228 is 82280778.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 87708228.

It is an unprimeable number.

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, 3654498 + ... + 3654521.

It is an arithmetic number, because the mean of its divisors is an integer number (17054380).

Almost surely, 2^87708228 is an apocalyptic number.

It is an amenable number.

87708228 is an abundant number, since it is smaller than the sum of its proper divisors (116944332).

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

87708228 is a wasteful number, since it uses less digits than its factorization.

87708228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7309026 (or 7309024 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 42.

The square root of 87708228 is about 9365.2671077765. The cubic root of 87708228 is about 444.3038865988.

The spelling of 87708228 in words is "eighty-seven million, seven hundred eight thousand, two hundred twenty-eight".