28857144460 has 12 divisors (see below), whose sum is σ = 60600003408. Its totient is φ = 11542857776.

The previous prime is 28857144443. The next prime is 28857144497. The reversal of 28857144460 is 6444175882.

It is a happy number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 721428592 + ... + 721428631.

It is an arithmetic number, because the mean of its divisors is an integer number (5050000284).

Almost surely, 2^28857144460 is an apocalyptic number.

28857144460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28857144460 is an abundant number, since it is smaller than the sum of its proper divisors (31742858948).

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

28857144460 is a wasteful number, since it uses less digits than its factorization.

28857144460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1442857232 (or 1442857230 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 49.

The spelling of 28857144460 in words is "twenty-eight billion, eight hundred fifty-seven million, one hundred forty-four thousand, four hundred sixty".