81070360 has 64 divisors (see below), whose sum is σ = 210067200. Its totient is φ = 27582336.

The previous prime is 81070349. The next prime is 81070361. The reversal of 81070360 is 6307018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81070361) 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, 37879 + ... + 39961.

It is an arithmetic number, because the mean of its divisors is an integer number (3282300).

Almost surely, 2^81070360 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 81070360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105033600).

81070360 is an abundant number, since it is smaller than the sum of its proper divisors (128996840).

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

81070360 is a wasteful number, since it uses less digits than its factorization.

81070360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240 (or 2236 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 81070360 is about 9003.9080404011. The cubic root of 81070360 is about 432.8001146868.

Adding to 81070360 its reverse (6307018), we get a palindrome (87377378).

The spelling of 81070360 in words is "eighty-one million, seventy thousand, three hundred sixty".