728521885274 has 16 divisors (see below), whose sum is σ = 1100578509000. Its totient is φ = 361664433984.

The previous prime is 728521885211. The next prime is 728521885291. The reversal of 728521885274 is 472588125827.

It can be written as a sum of positive squares in 4 ways, for example, as 556717438225 + 171804447049 = 746135^2 + 414493^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200264 + ... + 1223580.

Almost surely, 2^728521885274 is an apocalyptic number.

728521885274 is a deficient number, since it is larger than the sum of its proper divisors (372056623726).

728521885274 is a wasteful number, since it uses less digits than its factorization.

728521885274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025857.

The product of its digits is 20070400, while the sum is 59.

The spelling of 728521885274 in words is "seven hundred twenty-eight billion, five hundred twenty-one million, eight hundred eighty-five thousand, two hundred seventy-four".