86810890 has 8 divisors (see below), whose sum is σ = 156259620. Its totient is φ = 34724352.

The previous prime is 86810887. The next prime is 86810897. The reversal of 86810890 is 9801868.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 84768849 + 2042041 = 9207^2 + 1429^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×86810890² = 15072261245184200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86810897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4340535 + ... + 4340554.

Almost surely, 2^86810890 is an apocalyptic number.

86810890 is a deficient number, since it is larger than the sum of its proper divisors (69448730).

86810890 is a wasteful number, since it uses less digits than its factorization.

86810890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8681096.

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 86810890 is about 9317.2361781807. The cubic root of 86810890 is about 442.7834735493.

The spelling of 86810890 in words is "eighty-six million, eight hundred ten thousand, eight hundred ninety".