728263623 has 4 divisors (see below), whose sum is σ = 971018168. Its totient is φ = 485509080.

The previous prime is 728263621. The next prime is 728263693. The reversal of 728263623 is 326362827.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 728263623 - 2¹ = 728263621 is a prime.

It is a super-2 number, since 2×728263623² = 1060735809170172258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728263621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121377268 + ... + 121377273.

It is an arithmetic number, because the mean of its divisors is an integer number (242754542).

Almost surely, 2^728263623 is an apocalyptic number.

728263623 is a deficient number, since it is larger than the sum of its proper divisors (242754545).

728263623 is a wasteful number, since it uses less digits than its factorization.

728263623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242754544.

The product of its digits is 145152, while the sum is 39.

The square root of 728263623 is about 26986.3599434974. The cubic root of 728263623 is about 899.6968621061.

The spelling of 728263623 in words is "seven hundred twenty-eight million, two hundred sixty-three thousand, six hundred twenty-three".