86711890 has 16 divisors (see below), whose sum is σ = 156206232. Its totient is φ = 34657024.

The previous prime is 86711861. The next prime is 86711893. The reversal of 86711890 is 9811768.

It can be written as a sum of positive squares in 4 ways, for example, as 59243809 + 27468081 = 7697^2 + 5241^2 .

It is not an unprimeable number, because it can be changed into a prime (86711893) by changing a digit.

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, 13722 + ... + 19018.

Almost surely, 2^86711890 is an apocalyptic number.

86711890 is a deficient number, since it is larger than the sum of its proper divisors (69494342).

86711890 is a wasteful number, since it uses less digits than its factorization.

86711890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6941.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 86711890 is about 9311.9219283669. The cubic root of 86711890 is about 442.6150913031.

The spelling of 86711890 in words is "eighty-six million, seven hundred eleven thousand, eight hundred ninety".