86511690 has 24 divisors (see below), whose sum is σ = 224930628. Its totient is φ = 23069760.

The previous prime is 86511683. The next prime is 86511697. The reversal of 86511690 is 9611568.

86511690 is a `hidden beast` number, since 86 + 511 + 69 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (86511683) and next prime (86511697).

It can be written as a sum of positive squares in 2 ways, for example, as 79334649 + 7177041 = 8907^2 + 2679^2 .

It is a super-2 number, since 2×86511690² = 14968545013312200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (86511697) 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, 480531 + ... + 480710.

Almost surely, 2^86511690 is an apocalyptic number.

86511690 is an abundant number, since it is smaller than the sum of its proper divisors (138418938).

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

86511690 is a wasteful number, since it uses less digits than its factorization.

86511690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961254 (or 961251 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 86511690 is about 9301.1660559308. The cubic root of 86511690 is about 442.2741929396.

The spelling of 86511690 in words is "eighty-six million, five hundred eleven thousand, six hundred ninety".