28868645727 has 16 divisors (see below), whose sum is σ = 45284150880. Its totient is φ = 18113659776.

The previous prime is 28868645713. The next prime is 28868645759. The reversal of 28868645727 is 72754686882.

28868645727 is a `hidden beast` number, since 2 + 8 + 86 + 86 + 457 + 27 = 666.

It is not a de Polignac number, because 28868645727 - 2¹⁵ = 28868612959 is a prime.

It is a super-2 number, since 2×28868645727² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28868645797) 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, 31446868 + ... + 31447785.

It is an arithmetic number, because the mean of its divisors is an integer number (2830259430).

Almost surely, 2^28868645727 is an apocalyptic number.

28868645727 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28868645727 is a deficient number, since it is larger than the sum of its proper divisors (16415505153).

28868645727 is a wasteful number, since it uses less digits than its factorization.

28868645727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62894679 (or 62894673 counting only the distinct ones).

The product of its digits is 72253440, while the sum is 63.

The spelling of 28868645727 in words is "twenty-eight billion, eight hundred sixty-eight million, six hundred forty-five thousand, seven hundred twenty-seven".