28057745266 has 8 divisors (see below), whose sum is σ = 42108623964. Its totient is φ = 14021537280.

The previous prime is 28057745213. The next prime is 28057745273. The reversal of 28057745266 is 66254775082.

It can be written as a sum of positive squares in 2 ways, for example, as 21439109241 + 6618636025 = 146421^2 + 81355^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3662895 + ... + 3670546.

Almost surely, 2^28057745266 is an apocalyptic number.

28057745266 is a deficient number, since it is larger than the sum of its proper divisors (14050878698).

28057745266 is a wasteful number, since it uses less digits than its factorization.

28057745266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7335356.

The product of its (nonzero) digits is 5644800, while the sum is 52.

The spelling of 28057745266 in words is "twenty-eight billion, fifty-seven million, seven hundred forty-five thousand, two hundred sixty-six".