85308280 has 64 divisors (see below), whose sum is σ = 200620800. Its totient is φ = 32609280.

The previous prime is 85308269. The next prime is 85308287. The reversal of 85308280 is 8280358.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85308287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109974 + ... + 110746.

It is an arithmetic number, because the mean of its divisors is an integer number (3134700).

Almost surely, 2^85308280 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 85308280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100310400).

85308280 is an abundant number, since it is smaller than the sum of its proper divisors (115312520).

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

85308280 is a wasteful number, since it uses less digits than its factorization.

85308280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904 (or 900 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 85308280 is about 9236.2481560426. The cubic root of 85308280 is about 440.2138767375.

The spelling of 85308280 in words is "eighty-five million, three hundred eight thousand, two hundred eighty".