85885680 has 80 divisors (see below), whose sum is σ = 277839360. Its totient is φ = 21905664.

The previous prime is 85885669. The next prime is 85885687. The reversal of 85885680 is 8658858.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85885687) 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, 2260 + ... + 13299.

It is an arithmetic number, because the mean of its divisors is an integer number (3472992).

Almost surely, 2^85885680 is an apocalyptic number.

85885680 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 85885680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138919680).

85885680 is an abundant number, since it is smaller than the sum of its proper divisors (191953680).

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

85885680 is a wasteful number, since it uses less digits than its factorization.

85885680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15598 (or 15592 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 48.

The square root of 85885680 is about 9267.4527244545. The cubic root of 85885680 is about 441.2048246143.

The spelling of 85885680 in words is "eighty-five million, eight hundred eighty-five thousand, six hundred eighty".