85804644 has 48 divisors (see below), whose sum is σ = 215611200. Its totient is φ = 26459136.

The previous prime is 85804643. The next prime is 85804699. The reversal of 85804644 is 44640858.

It is not an unprimeable number, because it can be changed into a prime (85804643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8472 + ... + 15600.

It is an arithmetic number, because the mean of its divisors is an integer number (4491900).

Almost surely, 2^85804644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85804644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107805600).

85804644 is an abundant number, since it is smaller than the sum of its proper divisors (129806556).

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

85804644 is a wasteful number, since it uses less digits than its factorization.

85804644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7212 (or 7210 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 39.

The square root of 85804644 is about 9263.0796174922. The cubic root of 85804644 is about 441.0660171323.

The spelling of 85804644 in words is "eighty-five million, eight hundred four thousand, six hundred forty-four".