73421280 has 144 divisors (see below), whose sum is σ = 254623824. Its totient is φ = 19261440.

The previous prime is 73421279. The next prime is 73421287. The reversal of 73421280 is 8212437.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73421287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96100 + ... + 96860.

It is an arithmetic number, because the mean of its divisors is an integer number (1768221).

Almost surely, 2^73421280 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 73421280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127311912).

73421280 is an abundant number, since it is smaller than the sum of its proper divisors (181202544).

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

73421280 is a wasteful number, since it uses less digits than its factorization.

73421280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849 (or 838 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 73421280 is about 8568.6218261748. The cubic root of 73421280 is about 418.7363378627.

The spelling of 73421280 in words is "seventy-three million, four hundred twenty-one thousand, two hundred eighty".