85187284 has 72 divisors (see below), whose sum is σ = 189924000. Its totient is φ = 33130944.

The previous prime is 85187273. The next prime is 85187321. The reversal of 85187284 is 48278158.

It is a self number, because there is not a number n which added to its sum of digits gives 85187284.

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, 170467 + ... + 170965.

Almost surely, 2^85187284 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 85187284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94962000).

85187284 is an abundant number, since it is smaller than the sum of its proper divisors (104736716).

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

85187284 is a wasteful number, since it uses less digits than its factorization.

85187284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597 (or 588 counting only the distinct ones).

The product of its digits is 143360, while the sum is 43.

The square root of 85187284 is about 9229.6957696340. The cubic root of 85187284 is about 440.0056541973.

The spelling of 85187284 in words is "eighty-five million, one hundred eighty-seven thousand, two hundred eighty-four".