7273720730 has 32 divisors (see below), whose sum is σ = 13389652944. Its totient is φ = 2844205056.

The previous prime is 7273720723. The next prime is 7273720757. The reversal of 7273720730 is 370273727.

It can be written as a sum of positive squares in 8 ways, for example, as 1585393489 + 5688327241 = 39817^2 + 75421^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38402 + ... + 126578.

Almost surely, 2^7273720730 is an apocalyptic number.

7273720730 is a deficient number, since it is larger than the sum of its proper divisors (6115932214).

7273720730 is a wasteful number, since it uses less digits than its factorization.

7273720730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88370.

The product of its (nonzero) digits is 86436, while the sum is 38.

The square root of 7273720730 is about 85286.1110029060. Note that the first 3 decimals coincide. The cubic root of 7273720730 is about 1937.5468274773.

The spelling of 7273720730 in words is "seven billion, two hundred seventy-three million, seven hundred twenty thousand, seven hundred thirty".