28857358739 has 4 divisors (see below), whose sum is σ = 31480755000. Its totient is φ = 26233962480.

The previous prime is 28857358721. The next prime is 28857358759. The reversal of 28857358739 is 93785375882.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28857358739 - 2³² = 24562391443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28857358759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1311698114 + ... + 1311698135.

It is an arithmetic number, because the mean of its divisors is an integer number (7870188750).

Almost surely, 2^28857358739 is an apocalyptic number.

28857358739 is a deficient number, since it is larger than the sum of its proper divisors (2623396261).

28857358739 is a wasteful number, since it uses less digits than its factorization.

28857358739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2623396260.

The product of its digits is 101606400, while the sum is 65.

The spelling of 28857358739 in words is "twenty-eight billion, eight hundred fifty-seven million, three hundred fifty-eight thousand, seven hundred thirty-nine".