28057745278 has 4 divisors (see below), whose sum is σ = 42086617920. Its totient is φ = 14028872638.

The previous prime is 28057745273. The next prime is 28057745299. The reversal of 28057745278 is 87254775082.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28057745273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7014436318 + ... + 7014436321.

It is an arithmetic number, because the mean of its divisors is an integer number (10521654480).

Almost surely, 2^28057745278 is an apocalyptic number.

28057745278 is a deficient number, since it is larger than the sum of its proper divisors (14028872642).

28057745278 is a wasteful number, since it uses less digits than its factorization.

28057745278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14028872641.

The product of its (nonzero) digits is 8780800, while the sum is 55.

The spelling of 28057745278 in words is "twenty-eight billion, fifty-seven million, seven hundred forty-five thousand, two hundred seventy-eight".