73404720 has 120 divisors (see below), whose sum is σ = 248086800. Its totient is φ = 19450368.

The previous prime is 73404659. The next prime is 73404739. The reversal of 73404720 is 2740437.

It is a tau number, because it is divible by the number of its divisors (120).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 193491 + ... + 193869.

It is an arithmetic number, because the mean of its divisors is an integer number (2067390).

Almost surely, 2^73404720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73404720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124043400).

73404720 is an abundant number, since it is smaller than the sum of its proper divisors (174682080).

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

73404720 is a wasteful number, since it uses less digits than its factorization.

73404720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667 (or 658 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 73404720 is about 8567.6554552573. The cubic root of 73404720 is about 418.7048538245.

The spelling of 73404720 in words is "seventy-three million, four hundred four thousand, seven hundred twenty".