85806918 has 16 divisors (see below), whose sum is σ = 190682160. Its totient is φ = 28602288.

The previous prime is 85806899. The next prime is 85806943. The reversal of 85806918 is 81960858.

85806918 is a `hidden beast` number, since 8 + 580 + 69 + 1 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 794455 + ... + 794562.

It is an arithmetic number, because the mean of its divisors is an integer number (11917635).

Almost surely, 2^85806918 is an apocalyptic number.

85806918 is an abundant number, since it is smaller than the sum of its proper divisors (104875242).

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

85806918 is a wasteful number, since it uses less digits than its factorization.

85806918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589028 (or 1589022 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 85806918 is about 9263.2023620344. The cubic root of 85806918 is about 441.0699134842.

The spelling of 85806918 in words is "eighty-five million, eight hundred six thousand, nine hundred eighteen".