28779075345 has 16 divisors (see below), whose sum is σ = 48755139840. Its totient is φ = 14445967104.

The previous prime is 28779075341. The next prime is 28779075349. The reversal of 28779075345 is 54357097782.

It is an interprime number because it is at equal distance from previous prime (28779075341) and next prime (28779075349).

It is not a de Polignac number, because 28779075345 - 2² = 28779075341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28779075341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56429305 + ... + 56429814.

It is an arithmetic number, because the mean of its divisors is an integer number (3047196240).

Almost surely, 2^28779075345 is an apocalyptic number.

It is an amenable number.

28779075345 is a deficient number, since it is larger than the sum of its proper divisors (19976064495).

28779075345 is a wasteful number, since it uses less digits than its factorization.

28779075345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112859144.

The product of its (nonzero) digits is 14817600, while the sum is 57.

The spelling of 28779075345 in words is "twenty-eight billion, seven hundred seventy-nine million, seventy-five thousand, three hundred forty-five".