73999280 has 80 divisors (see below), whose sum is σ = 181488384. Its totient is φ = 28005120.

The previous prime is 73999279. The next prime is 73999309. The reversal of 73999280 is 8299937.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 240887 + ... + 241193.

Almost surely, 2^73999280 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 73999280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90744192).

73999280 is an abundant number, since it is smaller than the sum of its proper divisors (107489104).

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

73999280 is a wasteful number, since it uses less digits than its factorization.

73999280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474 (or 468 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 73999280 is about 8602.2834177909. The cubic root of 73999280 is about 419.8322837538.

The spelling of 73999280 in words is "seventy-three million, nine hundred ninety-nine thousand, two hundred eighty".