87515490 has 64 divisors (see below), whose sum is σ = 224726400. Its totient is φ = 21734400.

The previous prime is 87515479. The next prime is 87515497. The reversal of 87515490 is 9451578.

It is not an unprimeable number, because it can be changed into a prime (87515497) 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, 50661 + ... + 52359.

It is an arithmetic number, because the mean of its divisors is an integer number (3511350).

Almost surely, 2^87515490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87515490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112363200).

87515490 is an abundant number, since it is smaller than the sum of its proper divisors (137210910).

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

87515490 is a wasteful number, since it uses less digits than its factorization.

87515490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 87515490 is about 9354.9714056217. The cubic root of 87515490 is about 443.9781967217.

It can be divided in two parts, 8751 and 5490, that added together give a palindrome (14241).

The spelling of 87515490 in words is "eighty-seven million, five hundred fifteen thousand, four hundred ninety".