87899490 has 144 divisors (see below), whose sum is σ = 270938304. Its totient is φ = 19365120.

The previous prime is 87899459. The next prime is 87899507. The reversal of 87899490 is 9499878.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1058989 + ... + 1059071.

It is an arithmetic number, because the mean of its divisors is an integer number (1881516).

Almost surely, 2^87899490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87899490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135469152).

87899490 is an abundant number, since it is smaller than the sum of its proper divisors (183038814).

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

87899490 is a wasteful number, since it uses less digits than its factorization.

87899490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 87899490 is about 9375.4727880785. The cubic root of 87899490 is about 444.6266109956.

The spelling of 87899490 in words is "eighty-seven million, eight hundred ninety-nine thousand, four hundred ninety".