85052640 has 96 divisors (see below), whose sum is σ = 275214240. Its totient is φ = 22063104.

The previous prime is 85052633. The next prime is 85052647. The reversal of 85052640 is 4625058.

It is an interprime number because it is at equal distance from previous prime (85052633) and next prime (85052647).

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

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 85052598 and 85052607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85052647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15366 + ... + 20154.

It is an arithmetic number, because the mean of its divisors is an integer number (2866815).

Almost surely, 2^85052640 is an apocalyptic number.

85052640 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 85052640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137607120).

85052640 is an abundant number, since it is smaller than the sum of its proper divisors (190161600).

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

85052640 is a wasteful number, since it uses less digits than its factorization.

85052640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4844 (or 4836 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 85052640 is about 9222.3988202636. The cubic root of 85052640 is about 439.7737128441.

Adding to 85052640 its reverse (4625058), we get a palindrome (89677698).

The spelling of 85052640 in words is "eighty-five million, fifty-two thousand, six hundred forty".