85488291 has 80 divisors (see below), whose sum is σ = 158558400. Its totient is φ = 45722880.

The previous prime is 85488289. The next prime is 85488307. The reversal of 85488291 is 19288458.

It is a happy number.

85488291 is a `hidden beast` number, since 85 + 488 + 2 + 91 = 666.

It is not a de Polignac number, because 85488291 - 2¹ = 85488289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85488251) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 472221 + ... + 472401.

It is an arithmetic number, because the mean of its divisors is an integer number (1981980).

Almost surely, 2^85488291 is an apocalyptic number.

85488291 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

85488291 is a deficient number, since it is larger than the sum of its proper divisors (73070109).

85488291 is a wasteful number, since it uses less digits than its factorization.

85488291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 208 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 85488291 is about 9245.9878325682. The cubic root of 85488291 is about 440.5232944074.

The spelling of 85488291 in words is "eighty-five million, four hundred eighty-eight thousand, two hundred ninety-one".