71500986 has 24 divisors (see below), whose sum is σ = 155185524. Its totient is φ = 23792640.

The previous prime is 71500981. The next prime is 71500987. The reversal of 71500986 is 68900517.

71500986 is a `hidden beast` number, since 71 + 500 + 9 + 86 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 69205761 + 2295225 = 8319^2 + 1515^2 .

It is a super-2 number, since 2×71500986² = 10224781997944392, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71500986.

It is not an unprimeable number, because it can be changed into a prime (71500981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8440 + ... + 14636.

Almost surely, 2^71500986 is an apocalyptic number.

71500986 is an abundant number, since it is smaller than the sum of its proper divisors (83684538).

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

71500986 is a wasteful number, since it uses less digits than its factorization.

71500986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6846 (or 6843 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 71500986 is about 8455.8255658451. The cubic root of 71500986 is about 415.0534329032.

The spelling of 71500986 in words is "seventy-one million, five hundred thousand, nine hundred eighty-six".