28457294879 has 8 divisors (see below), whose sum is σ = 30817528560. Its totient is φ = 26121519936.

The previous prime is 28457294869. The next prime is 28457294881. The reversal of 28457294879 is 97849275482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28457294879 - 2⁴ = 28457294863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28457294809) 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 7 ways as a sum of consecutive naturals, for example, 6112262 + ... + 6116915.

It is an arithmetic number, because the mean of its divisors is an integer number (3852191070).

Almost surely, 2^28457294879 is an apocalyptic number.

28457294879 is a deficient number, since it is larger than the sum of its proper divisors (2360233681).

28457294879 is a wasteful number, since it uses less digits than its factorization.

28457294879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12229369.

The product of its digits is 81285120, while the sum is 65.

The spelling of 28457294879 in words is "twenty-eight billion, four hundred fifty-seven million, two hundred ninety-four thousand, eight hundred seventy-nine".