28457720352786 has 16 divisors (see below), whose sum is σ = 57502197827424. Its totient is φ = 9388113930624.

The previous prime is 28457720352769. The next prime is 28457720352791. The reversal of 28457720352786 is 68725302775482.

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, 24448212780 + ... + 24448213943.

It is an arithmetic number, because the mean of its divisors is an integer number (3593887364214).

Almost surely, 2^{28457720352786} is an apocalyptic number.

28457720352786 is an abundant number, since it is smaller than the sum of its proper divisors (29044477474638).

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

28457720352786 is a wasteful number, since it uses less digits than its factorization.

28457720352786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48896426825.

The product of its (nonzero) digits is 316108800, while the sum is 66.

The spelling of 28457720352786 in words is "twenty-eight trillion, four hundred fifty-seven billion, seven hundred twenty million, three hundred fifty-two thousand, seven hundred eighty-six".