87898590 has 72 divisors (see below), whose sum is σ = 247511160. Its totient is φ = 21632832.

The previous prime is 87898589. The next prime is 87898607. The reversal of 87898590 is 9589878.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12321 + ... + 18099.

It is an arithmetic number, because the mean of its divisors is an integer number (3437655).

Almost surely, 2^87898590 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87898590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123755580).

87898590 is an abundant number, since it is smaller than the sum of its proper divisors (159612570).

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

87898590 is a wasteful number, since it uses less digits than its factorization.

87898590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5818 (or 5802 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 54.

The square root of 87898590 is about 9375.4247903762. The cubic root of 87898590 is about 444.6250934847.

It can be divided in two parts, 87898 and 590, that added together give a palindrome (88488).

The spelling of 87898590 in words is "eighty-seven million, eight hundred ninety-eight thousand, five hundred ninety".