28304354745 has 32 divisors (see below), whose sum is σ = 50715095040. Its totient is φ = 14976783360.

The previous prime is 28304354723. The next prime is 28304354759. The reversal of 28304354745 is 54745340382.

28304354745 is a `hidden beast` number, since 28 + 3 + 0 + 43 + 547 + 45 = 666.

It is not a de Polignac number, because 28304354745 - 2⁶ = 28304354681 is a prime.

It is a super-2 number, since 2×28304354745² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28304354745.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 808296 + ... + 842585.

It is an arithmetic number, because the mean of its divisors is an integer number (1584846720).

Almost surely, 2^28304354745 is an apocalyptic number.

It is an amenable number.

28304354745 is a deficient number, since it is larger than the sum of its proper divisors (22410740295).

28304354745 is a wasteful number, since it uses less digits than its factorization.

28304354745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1651022 (or 1651016 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 45.

The spelling of 28304354745 in words is "twenty-eight billion, three hundred four million, three hundred fifty-four thousand, seven hundred forty-five".