7273403280 has 480 divisors, whose sum is σ = 29413867392. Its totient is φ = 1586995200.

The previous prime is 7273403257. The next prime is 7273403297. The reversal of 7273403280 is 823043727.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4220499 + ... + 4222221.

Almost surely, 2^7273403280 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 7273403280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14706933696).

7273403280 is an abundant number, since it is smaller than the sum of its proper divisors (22140464112).

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

7273403280 is a wasteful number, since it uses less digits than its factorization.

7273403280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807 (or 1798 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 7273403280 is about 85284.2498941041. The cubic root of 7273403280 is about 1937.5186400149.

The spelling of 7273403280 in words is "seven billion, two hundred seventy-three million, four hundred three thousand, two hundred eighty".