22729587728 has 10 divisors (see below), whose sum is σ = 44038576254. Its totient is φ = 11364793856.

The previous prime is 22729587719. The next prime is 22729587731. The reversal of 22729587728 is 82778592722.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12739185424 + 9990402304 = 112868^2 + 99952^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710299601 + ... + 710299632.

Almost surely, 2^22729587728 is an apocalyptic number.

It is an amenable number.

22729587728 is a deficient number, since it is larger than the sum of its proper divisors (21308988526).

22729587728 is a wasteful number, since it uses less digits than its factorization.

22729587728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420599241 (or 1420599235 counting only the distinct ones).

The product of its digits is 15805440, while the sum is 59.

The spelling of 22729587728 in words is "twenty-two billion, seven hundred twenty-nine million, five hundred eighty-seven thousand, seven hundred twenty-eight".