1369775728 has 20 divisors (see below), whose sum is σ = 2655932688. Its totient is φ = 684373760.

The previous prime is 1369775713. The next prime is 1369775747. The reversal of 1369775728 is 8275779631.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9676 + ... + 53227.

Almost surely, 2^1369775728 is an apocalyptic number.

It is an amenable number.

1369775728 is a deficient number, since it is larger than the sum of its proper divisors (1286156960).

1369775728 is a wasteful number, since it uses less digits than its factorization.

1369775728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64272 (or 64266 counting only the distinct ones).

The product of its digits is 4445280, while the sum is 55.

The square root of 1369775728 is about 37010.4813262405. The cubic root of 1369775728 is about 1110.5799334064.

The spelling of 1369775728 in words is "one billion, three hundred sixty-nine million, seven hundred seventy-five thousand, seven hundred twenty-eight".