1358187728 has 20 divisors (see below), whose sum is σ = 2638670400. Its totient is φ = 677240544.

The previous prime is 1358187709. The next prime is 1358187731. The reversal of 1358187728 is 8277818531.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109778 + ... + 121521.

It is an arithmetic number, because the mean of its divisors is an integer number (131933520).

Almost surely, 2^1358187728 is an apocalyptic number.

It is an amenable number.

1358187728 is a deficient number, since it is larger than the sum of its proper divisors (1280482672).

1358187728 is a wasteful number, since it uses less digits than its factorization.

1358187728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231674 (or 231668 counting only the distinct ones).

The product of its digits is 752640, while the sum is 50.

The square root of 1358187728 is about 36853.5985759871. The cubic root of 1358187728 is about 1107.4393067341.

The spelling of 1358187728 in words is "one billion, three hundred fifty-eight million, one hundred eighty-seven thousand, seven hundred twenty-eight".