728722293 has 8 divisors (see below), whose sum is σ = 1046370528. Its totient is φ = 448444464.

The previous prime is 728722277. The next prime is 728722303. The reversal of 728722293 is 392227827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 728722293 - 2⁴ = 728722277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728722213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9342555 + ... + 9342632.

It is an arithmetic number, because the mean of its divisors is an integer number (130796316).

Almost surely, 2^728722293 is an apocalyptic number.

It is an amenable number.

728722293 is a deficient number, since it is larger than the sum of its proper divisors (317648235).

728722293 is a wasteful number, since it uses less digits than its factorization.

728722293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18685203.

The product of its digits is 169344, while the sum is 42.

The square root of 728722293 is about 26994.8567879142. The cubic root of 728722293 is about 899.8857027692.

The spelling of 728722293 in words is "seven hundred twenty-eight million, seven hundred twenty-two thousand, two hundred ninety-three".