28126072773604 has 27 divisors (see below), whose sum is σ = 53298337069467. Its totient is φ = 12981200716224.

The previous prime is 28126072773593. The next prime is 28126072773619. The reversal of 28126072773604 is 40637727062182.

The square root of 28126072773604 is 5303402.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2276169655204 + 25849903118400 = 1508698^2 + 5084280^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 137786464 + ... + 137990440.

Almost surely, 2^{28126072773604} is an apocalyptic number.

28126072773604 is the 5303402-nd square number.

It is an amenable number.

28126072773604 is a deficient number, since it is larger than the sum of its proper divisors (25172264295863).

28126072773604 is an frugal number, since it uses more digits than its factorization.

28126072773604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407984 (or 203992 counting only the distinct ones).

The product of its (nonzero) digits is 9483264, while the sum is 55.

The spelling of 28126072773604 in words is "twenty-eight trillion, one hundred twenty-six billion, seventy-two million, seven hundred seventy-three thousand, six hundred four".