85540280 has 96 divisors (see below), whose sum is σ = 235774800. Its totient is φ = 27772416.

The previous prime is 85540267. The next prime is 85540291. The reversal of 85540280 is 8204558.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36092 + ... + 38388.

Almost surely, 2^85540280 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 85540280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117887400).

85540280 is an abundant number, since it is smaller than the sum of its proper divisors (150234520).

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

85540280 is a wasteful number, since it uses less digits than its factorization.

85540280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2341 (or 2330 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 85540280 is about 9248.7988409306. The cubic root of 85540280 is about 440.6125765154.

The spelling of 85540280 in words is "eighty-five million, five hundred forty thousand, two hundred eighty".