87551620 has 96 divisors (see below), whose sum is σ = 214502400. Its totient is φ = 29735424.

The previous prime is 87551599. The next prime is 87551627. The reversal of 87551620 is 2615578.

It is not an unprimeable number, because it can be changed into a prime (87551627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 182541 + ... + 183019.

It is an arithmetic number, because the mean of its divisors is an integer number (2234400).

Almost surely, 2^87551620 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 87551620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107251200).

87551620 is an abundant number, since it is smaller than the sum of its proper divisors (126950780).

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

87551620 is a wasteful number, since it uses less digits than its factorization.

87551620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557 (or 555 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 87551620 is about 9356.9022651730. The cubic root of 87551620 is about 444.0392858131.

The spelling of 87551620 in words is "eighty-seven million, five hundred fifty-one thousand, six hundred twenty".