28728873158600 has 24 divisors (see below), whose sum is σ = 66794630094210. Its totient is φ = 11491549263360.

The previous prime is 28728873158561. The next prime is 28728873158627. The reversal of 28728873158600 is 685137882782.

It can be written as a sum of positive squares in 3 ways, for example, as 21904103553124 + 6824769605476 = 4680182^2 + 2612426^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71822182697 + ... + 71822183096.

Almost surely, 2^{28728873158600} is an apocalyptic number.

28728873158600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28728873158600 is an abundant number, since it is smaller than the sum of its proper divisors (38065756935610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28728873158600 is a wasteful number, since it uses less digits than its factorization.

28728873158600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143644365809 (or 143644365800 counting only the distinct ones).

The product of its (nonzero) digits is 72253440, while the sum is 65.

The spelling of 28728873158600 in words is "twenty-eight trillion, seven hundred twenty-eight billion, eight hundred seventy-three million, one hundred fifty-eight thousand, six hundred".