73070320 has 80 divisors (see below), whose sum is σ = 175569120. Its totient is φ = 28270592.

The previous prime is 73070311. The next prime is 73070321. The reversal of 73070320 is 2307037.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 73070291 and 73070300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73070321) 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, 533292 + ... + 533428.

It is an arithmetic number, because the mean of its divisors is an integer number (2194614).

Almost surely, 2^73070320 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 73070320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87784560).

73070320 is an abundant number, since it is smaller than the sum of its proper divisors (102498800).

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

73070320 is a wasteful number, since it uses less digits than its factorization.

73070320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 882, while the sum is 22.

The square root of 73070320 is about 8548.1179215076. The cubic root of 73070320 is about 418.0680734352.

Adding to 73070320 its reverse (2307037), we get a palindrome (75377357).

The spelling of 73070320 in words is "seventy-three million, seventy thousand, three hundred twenty".