85691998 has 32 divisors (see below), whose sum is σ = 154902528. Its totient is φ = 34776000.

The previous prime is 85691911. The next prime is 85692017. The reversal of 85691998 is 89919658.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18298 + ... + 22498.

It is an arithmetic number, because the mean of its divisors is an integer number (4840704).

Almost surely, 2^85691998 is an apocalyptic number.

85691998 is a deficient number, since it is larger than the sum of its proper divisors (69210530).

85691998 is a wasteful number, since it uses less digits than its factorization.

85691998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4288.

The product of its digits is 1399680, while the sum is 55.

The square root of 85691998 is about 9256.9972453275. The cubic root of 85691998 is about 440.8729192676.

The spelling of 85691998 in words is "eighty-five million, six hundred ninety-one thousand, nine hundred ninety-eight".