87366990 has 64 divisors (see below), whose sum is σ = 222382080. Its totient is φ = 21928320.

The previous prime is 87366989. The next prime is 87367001. The reversal of 87366990 is 9966378.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33141 + ... + 35679.

It is an arithmetic number, because the mean of its divisors is an integer number (3474720).

Almost surely, 2^87366990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87366990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111191040).

87366990 is an abundant number, since it is smaller than the sum of its proper divisors (135015090).

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

87366990 is a wasteful number, since it uses less digits than its factorization.

87366990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2617.

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 87366990 is about 9347.0310794391. The cubic root of 87366990 is about 443.7269341975.

The spelling of 87366990 in words is "eighty-seven million, three hundred sixty-six thousand, nine hundred ninety".