28857144459 has 32 divisors (see below), whose sum is σ = 46164593664. Its totient is φ = 15800359680.

The previous prime is 28857144443. The next prime is 28857144497. The reversal of 28857144459 is 95444175882.

It is not a de Polignac number, because 28857144459 - 2⁴ = 28857144443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28857144399 and 28857144408.

It is not an unprimeable number, because it can be changed into a prime (28857144409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 695434 + ... + 735759.

It is an arithmetic number, because the mean of its divisors is an integer number (1442643552).

Almost surely, 2^28857144459 is an apocalyptic number.

28857144459 is a deficient number, since it is larger than the sum of its proper divisors (17307449205).

28857144459 is a wasteful number, since it uses less digits than its factorization.

28857144459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431267.

The product of its digits is 12902400, while the sum is 57.

The spelling of 28857144459 in words is "twenty-eight billion, eight hundred fifty-seven million, one hundred forty-four thousand, four hundred fifty-nine".