28057801278 has 16 divisors (see below), whose sum is σ = 60432187536. Its totient is φ = 8633169600.

The previous prime is 28057801271. The next prime is 28057801279. The reversal of 28057801278 is 87210875082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28057801271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179857623 + ... + 179857778.

It is an arithmetic number, because the mean of its divisors is an integer number (3777011721).

Almost surely, 2^28057801278 is an apocalyptic number.

28057801278 is an abundant number, since it is smaller than the sum of its proper divisors (32374386258).

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

28057801278 is a wasteful number, since it uses less digits than its factorization.

28057801278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359715419.

The product of its (nonzero) digits is 501760, while the sum is 48.

The spelling of 28057801278 in words is "twenty-eight billion, fifty-seven million, eight hundred one thousand, two hundred seventy-eight".