87644580 has 24 divisors (see below), whose sum is σ = 245404992. Its totient is φ = 23371872.

The previous prime is 87644573. The next prime is 87644591. The reversal of 87644580 is 8544678.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 730312 + ... + 730431.

It is an arithmetic number, because the mean of its divisors is an integer number (10225208).

Almost surely, 2^87644580 is an apocalyptic number.

It is an amenable number.

87644580 is an abundant number, since it is smaller than the sum of its proper divisors (157760412).

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

87644580 is a wasteful number, since it uses less digits than its factorization.

87644580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1460755 (or 1460753 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 87644580 is about 9361.8684032622. The cubic root of 87644580 is about 444.1963866235.

The spelling of 87644580 in words is "eighty-seven million, six hundred forty-four thousand, five hundred eighty".