28057144786 has 32 divisors (see below), whose sum is σ = 46188527616. Its totient is φ = 12676458000.

The previous prime is 28057144783. The next prime is 28057144799. The reversal of 28057144786 is 68744175082.

It is not an unprimeable number, because it can be changed into a prime (28057144783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8868841 + ... + 8872003.

It is an arithmetic number, because the mean of its divisors is an integer number (1443391488).

Almost surely, 2^28057144786 is an apocalyptic number.

28057144786 is a deficient number, since it is larger than the sum of its proper divisors (18131382830).

28057144786 is a wasteful number, since it uses less digits than its factorization.

28057144786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5478.

The product of its (nonzero) digits is 3010560, while the sum is 52.

The spelling of 28057144786 in words is "twenty-eight billion, fifty-seven million, one hundred forty-four thousand, seven hundred eighty-six".