85025640 has 64 divisors (see below), whose sum is σ = 291519360. Its totient is φ = 19434240.

The previous prime is 85025599. The next prime is 85025657. The reversal of 85025640 is 4652058.

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 = 85025598 and 85025607.

It is an unprimeable number.

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, 49771 + ... + 51450.

It is an arithmetic number, because the mean of its divisors is an integer number (4554990).

Almost surely, 2^85025640 is an apocalyptic number.

It is an amenable number.

85025640 is an abundant number, since it is smaller than the sum of its proper divisors (206493720).

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

85025640 is a wasteful number, since it uses less digits than its factorization.

85025640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101242 (or 101238 counting only the distinct ones).

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

The square root of 85025640 is about 9220.9348766814. The cubic root of 85025640 is about 439.7271724626.

Adding to 85025640 its reverse (4652058), we get a palindrome (89677698).

The spelling of 85025640 in words is "eighty-five million, twenty-five thousand, six hundred forty".