85991774 has 32 divisors (see below), whose sum is σ = 145692000. Its totient is φ = 37722240.

The previous prime is 85991771. The next prime is 85991803. The reversal of 85991774 is 47719958.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85991771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120932 + ... + 121640.

It is an arithmetic number, because the mean of its divisors is an integer number (4552875).

Almost surely, 2^85991774 is an apocalyptic number.

85991774 is a deficient number, since it is larger than the sum of its proper divisors (59700226).

85991774 is a wasteful number, since it uses less digits than its factorization.

85991774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908.

The product of its digits is 635040, while the sum is 50.

The square root of 85991774 is about 9273.1749686933. The cubic root of 85991774 is about 441.3864223052.

The spelling of 85991774 in words is "eighty-five million, nine hundred ninety-one thousand, seven hundred seventy-four".