87398520 has 128 divisors (see below), whose sum is σ = 290269440. Its totient is φ = 20874240.

The previous prime is 87398503. The next prime is 87398527. The reversal of 87398520 is 2589378.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87398527) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 95907 + ... + 96813.

It is an arithmetic number, because the mean of its divisors is an integer number (2267730).

Almost surely, 2^87398520 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 87398520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145134720).

87398520 is an abundant number, since it is smaller than the sum of its proper divisors (202870920).

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

87398520 is a wasteful number, since it uses less digits than its factorization.

87398520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005 (or 1001 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 87398520 is about 9348.7175591094. The cubic root of 87398520 is about 443.7803068635.

The spelling of 87398520 in words is "eighty-seven million, three hundred ninety-eight thousand, five hundred twenty".