85534240 has 96 divisors (see below), whose sum is σ = 230138496. Its totient is φ = 29736960.

The previous prime is 85534213. The next prime is 85534249. The reversal of 85534240 is 4243558.

It is a super-2 number, since 2×85534240² = 14632212424755200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85534249) 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, 39424 + ... + 41536.

It is an arithmetic number, because the mean of its divisors is an integer number (2397276).

Almost surely, 2^85534240 is an apocalyptic number.

85534240 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 85534240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115069248).

85534240 is an abundant number, since it is smaller than the sum of its proper divisors (144604256).

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

85534240 is a wasteful number, since it uses less digits than its factorization.

85534240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162 (or 2154 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 85534240 is about 9248.4723062785. The cubic root of 85534240 is about 440.6022057185.

Adding to 85534240 its reverse (4243558), we get a palindrome (89777798).

The spelling of 85534240 in words is "eighty-five million, five hundred thirty-four thousand, two hundred forty".