85618780 has 72 divisors (see below), whose sum is σ = 197929872. Its totient is φ = 31090176.

The previous prime is 85618747. The next prime is 85618781. The reversal of 85618780 is 8781658.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85618781) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 246567 + ... + 246913.

It is an arithmetic number, because the mean of its divisors is an integer number (2749026).

Almost surely, 2^85618780 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 85618780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98964936).

85618780 is an abundant number, since it is smaller than the sum of its proper divisors (112311092).

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

85618780 is a wasteful number, since it uses less digits than its factorization.

85618780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455 (or 440 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 43.

The square root of 85618780 is about 9253.0416620698. The cubic root of 85618780 is about 440.7473181529.

The spelling of 85618780 in words is "eighty-five million, six hundred eighteen thousand, seven hundred eighty".