85289280 has 56 divisors (see below), whose sum is σ = 270796512. Its totient is φ = 22743552.

The previous prime is 85289273. The next prime is 85289291. The reversal of 85289280 is 8298258.

It is a super-2 number, since 2×85289280² = 14548522565836800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43462 + ... + 45381.

It is an arithmetic number, because the mean of its divisors is an integer number (4835652).

Almost surely, 2^85289280 is an apocalyptic number.

85289280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

85289280 is an abundant number, since it is smaller than the sum of its proper divisors (185507232).

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

85289280 is a wasteful number, since it uses less digits than its factorization.

85289280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88863 (or 88853 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 42.

The square root of 85289280 is about 9235.2195425989. The cubic root of 85289280 is about 440.1811925920.

The spelling of 85289280 in words is "eighty-five million, two hundred eighty-nine thousand, two hundred eighty".