87552990 has 96 divisors (see below), whose sum is σ = 268609536. Its totient is φ = 19362240.

The previous prime is 87552977. The next prime is 87553003. The reversal of 87552990 is 9925578.

It is a happy number.

87552990 is a `hidden beast` number, since 8 + 7 + 552 + 9 + 90 = 666.

It is an interprime number because it is at equal distance from previous prime (87552977) and next prime (87553003).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17289 + ... + 21771.

It is an arithmetic number, because the mean of its divisors is an integer number (2798016).

Almost surely, 2^87552990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87552990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134304768).

87552990 is an abundant number, since it is smaller than the sum of its proper divisors (181056546).

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

87552990 is a wasteful number, since it uses less digits than its factorization.

87552990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4534 (or 4531 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The square root of 87552990 is about 9356.9754728758. The cubic root of 87552990 is about 444.0416018968.

The spelling of 87552990 in words is "eighty-seven million, five hundred fifty-two thousand, nine hundred ninety".