85517898 has 16 divisors (see below), whose sum is σ = 180037920. Its totient is φ = 27005616.

The previous prime is 85517857. The next prime is 85517899. The reversal of 85517898 is 89871558.

It is a self number, because there is not a number n which added to its sum of digits gives 85517898.

It is not an unprimeable number, because it can be changed into a prime (85517899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374965 + ... + 375192.

It is an arithmetic number, because the mean of its divisors is an integer number (11252370).

Almost surely, 2^85517898 is an apocalyptic number.

85517898 is an abundant number, since it is smaller than the sum of its proper divisors (94520022).

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

85517898 is a wasteful number, since it uses less digits than its factorization.

85517898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750181.

The product of its digits is 806400, while the sum is 51.

The square root of 85517898 is about 9247.5887668084. The cubic root of 85517898 is about 440.5741437407.

The spelling of 85517898 in words is "eighty-five million, five hundred seventeen thousand, eight hundred ninety-eight".