73081320 has 128 divisors (see below), whose sum is σ = 239500800. Its totient is φ = 17731584.

The previous prime is 73081319. The next prime is 73081367. The reversal of 73081320 is 2318037.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122944 + ... + 123536.

It is an arithmetic number, because the mean of its divisors is an integer number (1871100).

Almost surely, 2^73081320 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 73081320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119750400).

73081320 is an abundant number, since it is smaller than the sum of its proper divisors (166419480).

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

73081320 is a wasteful number, since it uses less digits than its factorization.

73081320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 695 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 73081320 is about 8548.7613137811. The cubic root of 73081320 is about 418.0890510271.

Adding to 73081320 its reverse (2318037), we get a palindrome (75399357).

The spelling of 73081320 in words is "seventy-three million, eighty-one thousand, three hundred twenty".