73730720 has 48 divisors (see below), whose sum is σ = 199075968. Its totient is φ = 25278720.

The previous prime is 73730689. The next prime is 73730729. The reversal of 73730720 is 2703737.

It is not an unprimeable number, because it can be changed into a prime (73730729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31796 + ... + 34035.

It is an arithmetic number, because the mean of its divisors is an integer number (4147416).

Almost surely, 2^73730720 is an apocalyptic number.

73730720 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

73730720 is an abundant number, since it is smaller than the sum of its proper divisors (125345248).

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

73730720 is a wasteful number, since it uses less digits than its factorization.

73730720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65853 (or 65845 counting only the distinct ones).

The product of its (nonzero) digits is 6174, while the sum is 29.

The square root of 73730720 is about 8586.6594202868. The cubic root of 73730720 is about 419.3237795614.

The spelling of 73730720 in words is "seventy-three million, seven hundred thirty thousand, seven hundred twenty".