28891012001296 has 15 divisors (see below), whose sum is σ = 55976377409071. Its totient is φ = 14445495250576.

The previous prime is 28891012001261. The next prime is 28891012001309. The reversal of 28891012001296 is 69210021019882.

The square root of 28891012001296 is 5375036.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 20828265 + ... + 22172023.

Almost surely, 2^{28891012001296} is an apocalyptic number.

28891012001296 is the 5375036-th square number.

It is an amenable number.

28891012001296 is a deficient number, since it is larger than the sum of its proper divisors (27085365407775).

28891012001296 is an frugal number, since it uses more digits than its factorization.

28891012001296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2687526 (or 1343761 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 49.

The spelling of 28891012001296 in words is "twenty-eight trillion, eight hundred ninety-one billion, twelve million, one thousand, two hundred ninety-six".