85512240 has 320 divisors, whose sum is σ = 332121600. Its totient is φ = 20044800.

The previous prime is 85512233. The next prime is 85512253. The reversal of 85512240 is 4221558.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1401810 + ... + 1401870.

It is an arithmetic number, because the mean of its divisors is an integer number (1037880).

Almost surely, 2^85512240 is an apocalyptic number.

85512240 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 85512240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166060800).

85512240 is an abundant number, since it is smaller than the sum of its proper divisors (246609360).

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

85512240 is a wasteful number, since it uses less digits than its factorization.

85512240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 85512240 is about 9247.2828441656. The cubic root of 85512240 is about 440.5644271646.

Adding to 85512240 its reverse (4221558), we get a palindrome (89733798).

The spelling of 85512240 in words is "eighty-five million, five hundred twelve thousand, two hundred forty".