81350860 has 12 divisors (see below), whose sum is σ = 170836848. Its totient is φ = 32540336.

The previous prime is 81350807. The next prime is 81350861. The reversal of 81350860 is 6805318.

It is not an unprimeable number, because it can be changed into a prime (81350861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2033752 + ... + 2033791.

It is an arithmetic number, because the mean of its divisors is an integer number (14236404).

Almost surely, 2^81350860 is an apocalyptic number.

It is an amenable number.

81350860 is an abundant number, since it is smaller than the sum of its proper divisors (89485988).

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

81350860 is a wasteful number, since it uses less digits than its factorization.

81350860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4067552 (or 4067550 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 81350860 is about 9019.4711596634. The cubic root of 81350860 is about 433.2986967713.

The spelling of 81350860 in words is "eighty-one million, three hundred fifty thousand, eight hundred sixty".