28857489206 has 48 divisors (see below), whose sum is σ = 53602972128. Its totient is φ = 11408716800.

The previous prime is 28857489203. The next prime is 28857489209. The reversal of 28857489206 is 60298475882.

It is an interprime number because it is at equal distance from previous prime (28857489203) and next prime (28857489209).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28857489203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4920716 + ... + 4926576.

It is an arithmetic number, because the mean of its divisors is an integer number (1116728586).

Almost surely, 2^28857489206 is an apocalyptic number.

28857489206 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28857489206 is a deficient number, since it is larger than the sum of its proper divisors (24745482922).

28857489206 is a wasteful number, since it uses less digits than its factorization.

28857489206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7977 (or 7964 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 59.

The spelling of 28857489206 in words is "twenty-eight billion, eight hundred fifty-seven million, four hundred eighty-nine thousand, two hundred six".