73209730 has 32 divisors (see below), whose sum is σ = 144244800. Its totient is φ = 26531520.

The previous prime is 73209707. The next prime is 73209739. The reversal of 73209730 is 3790237.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 73209692 and 73209701.

It is not an unprimeable number, because it can be changed into a prime (73209739) 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, 37437 + ... + 39343.

It is an arithmetic number, because the mean of its divisors is an integer number (4507650).

Almost surely, 2^73209730 is an apocalyptic number.

73209730 is a deficient number, since it is larger than the sum of its proper divisors (71035070).

73209730 is a wasteful number, since it uses less digits than its factorization.

73209730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2274.

The product of its (nonzero) digits is 7938, while the sum is 31.

The square root of 73209730 is about 8556.2684623614. The cubic root of 73209730 is about 418.3337802393. Note that the first 3 decimals are identical.

Adding to 73209730 its reverse (3790237), we get a palindrome (76999967).

The spelling of 73209730 in words is "seventy-three million, two hundred nine thousand, seven hundred thirty".