724128273 has 24 divisors (see below), whose sum is σ = 1143451296. Its totient is φ = 437942400.

The previous prime is 724128269. The next prime is 724128281. The reversal of 724128273 is 372821427.

It is not a de Polignac number, because 724128273 - 2² = 724128269 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (724128203) 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, 41161 + ... + 56057.

It is an arithmetic number, because the mean of its divisors is an integer number (47643804).

Almost surely, 2^724128273 is an apocalyptic number.

It is an amenable number.

724128273 is a deficient number, since it is larger than the sum of its proper divisors (419323023).

724128273 is a wasteful number, since it uses less digits than its factorization.

724128273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15405 (or 15402 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 724128273 is about 26909.6316028295. The cubic root of 724128273 is about 897.9906915006.

The spelling of 724128273 in words is "seven hundred twenty-four million, one hundred twenty-eight thousand, two hundred seventy-three".