87561570 has 16 divisors (see below), whose sum is σ = 210147840. Its totient is φ = 23349744.

The previous prime is 87561497. The next prime is 87561581. The reversal of 87561570 is 7516578.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1459330 + ... + 1459389.

It is an arithmetic number, because the mean of its divisors is an integer number (13134240).

Almost surely, 2^87561570 is an apocalyptic number.

87561570 is an abundant number, since it is smaller than the sum of its proper divisors (122586270).

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

87561570 is a wasteful number, since it uses less digits than its factorization.

87561570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2918729.

The product of its (nonzero) digits is 58800, while the sum is 39.

The square root of 87561570 is about 9357.4339431278. The cubic root of 87561570 is about 444.0561064557.

The spelling of 87561570 in words is "eighty-seven million, five hundred sixty-one thousand, five hundred seventy".