85097790 has 80 divisors (see below), whose sum is σ = 236269440. Its totient is φ = 21954240.

The previous prime is 85097737. The next prime is 85097791. The reversal of 85097790 is 9779058.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85097791) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 23416 + ... + 26804.

It is an arithmetic number, because the mean of its divisors is an integer number (2953368).

Almost surely, 2^85097790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85097790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118134720).

85097790 is an abundant number, since it is smaller than the sum of its proper divisors (151171650).

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

85097790 is a wasteful number, since it uses less digits than its factorization.

85097790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3439 (or 3430 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The square root of 85097790 is about 9224.8463401837. The cubic root of 85097790 is about 439.8515167026.

The spelling of 85097790 in words is "eighty-five million, ninety-seven thousand, seven hundred ninety".