87311866 has 16 divisors (see below), whose sum is σ = 136248840. Its totient is φ = 41912640.

The previous prime is 87311843. The next prime is 87311867. The reversal of 87311866 is 66811378.

It can be written as a sum of positive squares in 4 ways, for example, as 74459641 + 12852225 = 8629^2 + 3585^2 .

It is not an unprimeable number, because it can be changed into a prime (87311867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6340 + ... + 14656.

Almost surely, 2^87311866 is an apocalyptic number.

87311866 is a deficient number, since it is larger than the sum of its proper divisors (48936974).

87311866 is a wasteful number, since it uses less digits than its factorization.

87311866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8529.

The product of its digits is 48384, while the sum is 40.

The square root of 87311866 is about 9344.0818703605. The cubic root of 87311866 is about 443.6335917362.

The spelling of 87311866 in words is "eighty-seven million, three hundred eleven thousand, eight hundred sixty-six".