728524922 has 4 divisors (see below), whose sum is σ = 1092787386. Its totient is φ = 364262460.

The previous prime is 728524843. The next prime is 728524933. The reversal of 728524922 is 229425827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 229425827 = 157 ⋅1461311.

It can be written as a sum of positive squares in only one way, i.e., 539214841 + 189310081 = 23221^2 + 13759^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 728524922.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 182131229 + ... + 182131232.

Almost surely, 2^728524922 is an apocalyptic number.

728524922 is a deficient number, since it is larger than the sum of its proper divisors (364262464).

728524922 is a wasteful number, since it uses less digits than its factorization.

728524922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364262463.

The product of its digits is 161280, while the sum is 41.

The square root of 728524922 is about 26991.2008254542. The cubic root of 728524922 is about 899.8044521656.

The spelling of 728524922 in words is "seven hundred twenty-eight million, five hundred twenty-four thousand, nine hundred twenty-two".