87221160 has 96 divisors (see below), whose sum is σ = 305290440. Its totient is φ = 21468672.

The previous prime is 87221117. The next prime is 87221177. The reversal of 87221160 is 6112278.

It can be written as a sum of positive squares in 4 ways, for example, as 23444964 + 63776196 = 4842^2 + 7986^2 .

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 23 ways as a sum of consecutive naturals, for example, 4639 + ... + 13998.

Almost surely, 2^87221160 is an apocalyptic number.

It is an amenable number.

87221160 is an abundant number, since it is smaller than the sum of its proper divisors (218069280).

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

87221160 is a wasteful number, since it uses less digits than its factorization.

87221160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18667 (or 18660 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 87221160 is about 9339.2269487362. The cubic root of 87221160 is about 443.4799120845.

The spelling of 87221160 in words is "eighty-seven million, two hundred twenty-one thousand, one hundred sixty".