73000000730 has 32 divisors (see below), whose sum is σ = 141035319504. Its totient is φ = 27105878016.

The previous prime is 73000000729. The next prime is 73000000753. The reversal of 73000000730 is 3700000037.

It can be written as a sum of positive squares in 8 ways, for example, as 54542332849 + 18457667881 = 233543^2 + 135859^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2928767 + ... + 2953586.

Almost surely, 2^73000000730 is an apocalyptic number.

73000000730 is a deficient number, since it is larger than the sum of its proper divisors (68035318774).

73000000730 is a wasteful number, since it uses less digits than its factorization.

73000000730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5882450.

The product of its (nonzero) digits is 441, while the sum is 20.

Adding to 73000000730 its reverse (3700000037), we get a palindrome (76700000767).

It can be divided in two parts, 730000007 and 30, that added together give a palindrome (730000037).

The spelling of 73000000730 in words is "seventy-three billion, seven hundred thirty", and thus it is an aban number.