28946894265 has 20 divisors (see below), whose sum is σ = 51889988964. Its totient is φ = 15438343392.

The previous prime is 28946894239. The next prime is 28946894281. The reversal of 28946894265 is 56249864982.

28946894265 is a `hidden beast` number, since 2 + 89 + 468 + 94 + 2 + 6 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9609488784 + 19337405481 = 98028^2 + 139059^2 .

It is not a de Polignac number, because 28946894265 - 2⁶ = 28946894201 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 35736502 + ... + 35737311.

Almost surely, 2^28946894265 is an apocalyptic number.

It is an amenable number.

28946894265 is a deficient number, since it is larger than the sum of its proper divisors (22943094699).

28946894265 is an equidigital number, since it uses as much as digits as its factorization.

28946894265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71473830 (or 71473821 counting only the distinct ones).

The product of its digits is 59719680, while the sum is 63.

The spelling of 28946894265 in words is "twenty-eight billion, nine hundred forty-six million, eight hundred ninety-four thousand, two hundred sixty-five".