85081320 has 64 divisors (see below), whose sum is σ = 283608000. Its totient is φ = 22688064.

The previous prime is 85081309. The next prime is 85081387. The reversal of 85081320 is 2318058.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38310 + ... + 40469.

It is an arithmetic number, because the mean of its divisors is an integer number (4431375).

Almost surely, 2^85081320 is an apocalyptic number.

It is an amenable number.

85081320 is an abundant number, since it is smaller than the sum of its proper divisors (198526680).

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

85081320 is a wasteful number, since it uses less digits than its factorization.

85081320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78799 (or 78789 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 85081320 is about 9223.9535991894. The cubic root of 85081320 is about 439.8231382849.

Adding to 85081320 its reverse (2318058), we get a palindrome (87399378).

The spelling of 85081320 in words is "eighty-five million, eighty-one thousand, three hundred twenty".