73998720 has 192 divisors, whose sum is σ = 264934800. Its totient is φ = 19009536.

The previous prime is 73998689. The next prime is 73998731. The reversal of 73998720 is 2789937.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 166819 + ... + 167261.

Almost surely, 2^73998720 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 73998720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132467400).

73998720 is an abundant number, since it is smaller than the sum of its proper divisors (190936080).

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

73998720 is a wasteful number, since it uses less digits than its factorization.

73998720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497 (or 482 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 73998720 is about 8602.2508682321. The cubic root of 73998720 is about 419.8312247044.

The spelling of 73998720 in words is "seventy-three million, nine hundred ninety-eight thousand, seven hundred twenty".