28000050057 has 32 divisors (see below), whose sum is σ = 48375008000. Its totient is φ = 16000023312.

The previous prime is 28000050053. The next prime is 28000050097. The reversal of 28000050057 is 75005000082.

It is a happy number.

It is not a de Polignac number, because 28000050057 - 2² = 28000050053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28000050057.

It is not an unprimeable number, because it can be changed into a prime (28000050053) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1502458 + ... + 1520979.

It is an arithmetic number, because the mean of its divisors is an integer number (1511719000).

Almost surely, 2^28000050057 is an apocalyptic number.

28000050057 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28000050057 is a deficient number, since it is larger than the sum of its proper divisors (20374957943).

28000050057 is an equidigital number, since it uses as much as digits as its factorization.

28000050057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3023467 (or 3023447 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The spelling of 28000050057 in words is "twenty-eight billion, fifty thousand, fifty-seven".