85489992 has 160 divisors (see below), whose sum is σ = 280177920. Its totient is φ = 23846400.

The previous prime is 85489981. The next prime is 85490021. The reversal of 85489992 is 29998458.

85489992 is a `hidden beast` number, since 8 + 548 + 9 + 9 + 92 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 212992 + ... + 213392.

It is an arithmetic number, because the mean of its divisors is an integer number (1751112).

Almost surely, 2^85489992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85489992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140088960).

85489992 is an abundant number, since it is smaller than the sum of its proper divisors (194687928).

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

85489992 is a wasteful number, since it uses less digits than its factorization.

85489992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473 (or 460 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 85489992 is about 9246.0798179553. The cubic root of 85489992 is about 440.5262161531.

The spelling of 85489992 in words is "eighty-five million, four hundred eighty-nine thousand, nine hundred ninety-two".