85307288 has 32 divisors (see below), whose sum is σ = 180126720. Its totient is φ = 37524000.

The previous prime is 85307279. The next prime is 85307323. The reversal of 85307288 is 88270358.

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, 12908 + ... + 18363.

It is an arithmetic number, because the mean of its divisors is an integer number (5628960).

Almost surely, 2^85307288 is an apocalyptic number.

85307288 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

85307288 is an abundant number, since it is smaller than the sum of its proper divisors (94819432).

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

85307288 is a wasteful number, since it uses less digits than its factorization.

85307288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31319 (or 31315 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 85307288 is about 9236.1944544276. The cubic root of 85307288 is about 440.2121704011.

The spelling of 85307288 in words is "eighty-five million, three hundred seven thousand, two hundred eighty-eight".