85491228 has 12 divisors (see below), whose sum is σ = 199479560. Its totient is φ = 28497072.

The previous prime is 85491223. The next prime is 85491229. The reversal of 85491228 is 82219458.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85491223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3562123 + ... + 3562146.

Almost surely, 2^85491228 is an apocalyptic number.

It is an amenable number.

85491228 is an abundant number, since it is smaller than the sum of its proper divisors (113988332).

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

85491228 is a wasteful number, since it uses less digits than its factorization.

85491228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7124276 (or 7124274 counting only the distinct ones).

The product of its digits is 46080, while the sum is 39.

The square root of 85491228 is about 9246.1466568512. The cubic root of 85491228 is about 440.5283391610.

The spelling of 85491228 in words is "eighty-five million, four hundred ninety-one thousand, two hundred twenty-eight".