85252240 has 40 divisors (see below), whose sum is σ = 208647360. Its totient is φ = 32305536.

The previous prime is 85252217. The next prime is 85252241. The reversal of 85252240 is 4225258.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 85252199 and 85252208.

It is not an unprimeable number, because it can be changed into a prime (85252241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26524 + ... + 29563.

It is an arithmetic number, because the mean of its divisors is an integer number (5216184).

Almost surely, 2^85252240 is an apocalyptic number.

85252240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

85252240 is an abundant number, since it is smaller than the sum of its proper divisors (123395120).

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

85252240 is a wasteful number, since it uses less digits than its factorization.

85252240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56119 (or 56113 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 85252240 is about 9233.2139583138. The cubic root of 85252240 is about 440.1174617527.

Adding to 85252240 its reverse (4225258), we get a palindrome (89477498).

The spelling of 85252240 in words is "eighty-five million, two hundred fifty-two thousand, two hundred forty".