87499188 has 72 divisors (see below), whose sum is σ = 253780800. Its totient is φ = 24900480.

The previous prime is 87499171. The next prime is 87499211. The reversal of 87499188 is 88199478.

It is a super-2 number, since 2×87499188² = 15312215801318688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82888 + ... + 83936.

Almost surely, 2^87499188 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 87499188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126890400).

87499188 is an abundant number, since it is smaller than the sum of its proper divisors (166281612).

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

87499188 is a wasteful number, since it uses less digits than its factorization.

87499188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397 (or 1392 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 54.

The square root of 87499188 is about 9354.1000636085. The cubic root of 87499188 is about 443.9506275755.

The spelling of 87499188 in words is "eighty-seven million, four hundred ninety-nine thousand, one hundred eighty-eight".