28894295401605 has 24 divisors (see below), whose sum is σ = 50083693529688. Its totient is φ = 15410214521856.

The previous prime is 28894295401571. The next prime is 28894295401627. The reversal of 28894295401605 is 50610459249882.

28894295401605 is a `hidden beast` number, since 2 + 8 + 8 + 9 + 4 + 29 + 540 + 1 + 60 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 8044898340609 + 20849397060996 = 2836353^2 + 4566114^2 .

It is not a de Polignac number, because 28894295401605 - 2²⁸ = 28894026966149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8262349 + ... + 11227421.

It is an arithmetic number, because the mean of its divisors is an integer number (2086820563737).

Almost surely, 2^{28894295401605} is an apocalyptic number.

It is an amenable number.

28894295401605 is a deficient number, since it is larger than the sum of its proper divisors (21189398128083).

28894295401605 is a wasteful number, since it uses less digits than its factorization.

28894295401605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3181637 (or 3181634 counting only the distinct ones).

The product of its (nonzero) digits is 49766400, while the sum is 63.

The spelling of 28894295401605 in words is "twenty-eight trillion, eight hundred ninety-four billion, two hundred ninety-five million, four hundred one thousand, six hundred five".