87199028 has 18 divisors (see below), whose sum is σ = 177512706. Its totient is φ = 37370928.

The previous prime is 87198997. The next prime is 87199031. The reversal of 87199028 is 82099178.

It can be written as a sum of positive squares in only one way, i.e., 87198244 + 784 = 9338^2 + 28^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 87199028.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 222251 + ... + 222642.

It is an arithmetic number, because the mean of its divisors is an integer number (9861817).

Almost surely, 2^87199028 is an apocalyptic number.

It is an amenable number.

87199028 is an abundant number, since it is smaller than the sum of its proper divisors (90313678).

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

87199028 is a wasteful number, since it uses less digits than its factorization.

87199028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444911 (or 444902 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 87199028 is about 9338.0419789161. The cubic root of 87199028 is about 443.4423985281.

It can be divided in two parts, 871 and 99028, that added together give a palindrome (99899).

The spelling of 87199028 in words is "eighty-seven million, one hundred ninety-nine thousand, twenty-eight".