87278660 has 48 divisors (see below), whose sum is σ = 211661184. Its totient is φ = 29611008.

The previous prime is 87278573. The next prime is 87278677. The reversal of 87278660 is 6687278.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 10367 + ... + 16793.

It is an arithmetic number, because the mean of its divisors is an integer number (4409608).

Almost surely, 2^87278660 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 87278660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105830592).

87278660 is an abundant number, since it is smaller than the sum of its proper divisors (124382524).

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

87278660 is a wasteful number, since it uses less digits than its factorization.

87278660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6540 (or 6538 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 87278660 is about 9342.3048547989. The cubic root of 87278660 is about 443.5773444561.

The spelling of 87278660 in words is "eighty-seven million, two hundred seventy-eight thousand, six hundred sixty".