73730730 has 64 divisors (see below), whose sum is σ = 181450368. Its totient is φ = 19169280.

The previous prime is 73730729. The next prime is 73730737. The reversal of 73730730 is 3703737.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (73730737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 286762 + ... + 287018.

It is an arithmetic number, because the mean of its divisors is an integer number (2835162).

Almost surely, 2^73730730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73730730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90725184).

73730730 is an abundant number, since it is smaller than the sum of its proper divisors (107719638).

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

73730730 is a wasteful number, since it uses less digits than its factorization.

73730730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471.

The product of its (nonzero) digits is 9261, while the sum is 30.

The square root of 73730730 is about 8586.6600025854. The cubic root of 73730730 is about 419.3237985188.

The spelling of 73730730 in words is "seventy-three million, seven hundred thirty thousand, seven hundred thirty".