85123240 has 32 divisors (see below), whose sum is σ = 192689280. Its totient is φ = 33842752.

The previous prime is 85123237. The next prime is 85123261. The reversal of 85123240 is 4232158.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309 + ... + 13051.

It is an arithmetic number, because the mean of its divisors is an integer number (6021540).

Almost surely, 2^85123240 is an apocalyptic number.

It is an amenable number.

85123240 is an abundant number, since it is smaller than the sum of its proper divisors (107566040).

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

85123240 is a wasteful number, since it uses less digits than its factorization.

85123240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12921 (or 12917 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 85123240 is about 9226.2256638346. The cubic root of 85123240 is about 439.8953607920.

Adding to 85123240 its reverse (4232158), we get a palindrome (89355398).

The spelling of 85123240 in words is "eighty-five million, one hundred twenty-three thousand, two hundred forty".