73309240 has 32 divisors (see below), whose sum is σ = 165240000. Its totient is φ = 29271424.

The previous prime is 73309213. The next prime is 73309241. The reversal of 73309240 is 4290337.

It is a junction number, because it is equal to n+sod(n) for n = 73309199 and 73309208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73309241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27486 + ... + 30034.

It is an arithmetic number, because the mean of its divisors is an integer number (5163750).

Almost surely, 2^73309240 is an apocalyptic number.

It is an amenable number.

73309240 is an abundant number, since it is smaller than the sum of its proper divisors (91930760).

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

73309240 is a wasteful number, since it uses less digits than its factorization.

73309240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3279 (or 3275 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 73309240 is about 8562.0815226205. The cubic root of 73309240 is about 418.5232338709.

Adding to 73309240 its reverse (4290337), we get a palindrome (77599577).

The spelling of 73309240 in words is "seventy-three million, three hundred nine thousand, two hundred forty".