85011840 has 96 divisors (see below), whose sum is σ = 293576400. Its totient is φ = 22668288.

The previous prime is 85011809. The next prime is 85011859. The reversal of 85011840 is 4811058.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1620 + ... + 13139.

Almost surely, 2^85011840 is an apocalyptic number.

85011840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85011840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146788200).

85011840 is an abundant number, since it is smaller than the sum of its proper divisors (208564560).

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

85011840 is a wasteful number, since it uses less digits than its factorization.

85011840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14784 (or 14769 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 85011840 is about 9220.1865490889. The cubic root of 85011840 is about 439.7033813516.

Adding to 85011840 its reverse (4811058), we get a palindrome (89822898).

The spelling of 85011840 in words is "eighty-five million, eleven thousand, eight hundred forty".