728562239 has 4 divisors (see below), whose sum is σ = 766907640. Its totient is φ = 690216840.

The previous prime is 728562193. The next prime is 728562281. The reversal of 728562239 is 932265827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 932265827 = 11273 ⋅82699.

It is a cyclic number.

It is not a de Polignac number, because 728562239 - 2²⁰ = 727513663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 728562239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728562299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19172672 + ... + 19172709.

It is an arithmetic number, because the mean of its divisors is an integer number (191726910).

Almost surely, 2^728562239 is an apocalyptic number.

728562239 is a deficient number, since it is larger than the sum of its proper divisors (38345401).

728562239 is a wasteful number, since it uses less digits than its factorization.

728562239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38345400.

The product of its digits is 362880, while the sum is 44.

The square root of 728562239 is about 26991.8920974429. The cubic root of 728562239 is about 899.8198153688.

The spelling of 728562239 in words is "seven hundred twenty-eight million, five hundred sixty-two thousand, two hundred thirty-nine".