728887273 has 4 divisors (see below), whose sum is σ = 760578048. Its totient is φ = 697196500.

The previous prime is 728887249. The next prime is 728887277. The reversal of 728887273 is 372788827.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 728887273 - 2⁵ = 728887241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 728887273.

It is not an unprimeable number, because it can be changed into a prime (728887277) 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, 15845353 + ... + 15845398.

It is an arithmetic number, because the mean of its divisors is an integer number (190144512).

Almost surely, 2^728887273 is an apocalyptic number.

It is an amenable number.

728887273 is a deficient number, since it is larger than the sum of its proper divisors (31690775).

728887273 is a wasteful number, since it uses less digits than its factorization.

728887273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31690774.

The product of its digits is 2107392, while the sum is 52.

The square root of 728887273 is about 26997.9123822565. The cubic root of 728887273 is about 899.9536078967.

The spelling of 728887273 in words is "seven hundred twenty-eight million, eight hundred eighty-seven thousand, two hundred seventy-three".