87819880 has 32 divisors (see below), whose sum is σ = 198404640. Its totient is φ = 34984000.

The previous prime is 87819839. The next prime is 87819899. The reversal of 87819880 is 8891878.

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, 5667 + ... + 14413.

It is an arithmetic number, because the mean of its divisors is an integer number (6200145).

Almost surely, 2^87819880 is an apocalyptic number.

It is an amenable number.

87819880 is an abundant number, since it is smaller than the sum of its proper divisors (110584760).

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

87819880 is a wasteful number, since it uses less digits than its factorization.

87819880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9009 (or 9005 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 49.

The square root of 87819880 is about 9371.2261737726. The cubic root of 87819880 is about 444.4923386349.

The spelling of 87819880 in words is "eighty-seven million, eight hundred nineteen thousand, eight hundred eighty".