28914434649 has 24 divisors (see below), whose sum is σ = 45859937760. Its totient is φ = 18142387776.

The previous prime is 28914434629. The next prime is 28914434651. The reversal of 28914434649 is 94643441982.

28914434649 is a `hidden beast` number, since 289 + 14 + 4 + 346 + 4 + 9 = 666.

It is not a de Polignac number, because 28914434649 - 2¹¹ = 28914432601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28914434595 and 28914434604.

It is not an unprimeable number, because it can be changed into a prime (28914434629) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3495559 + ... + 3503820.

It is an arithmetic number, because the mean of its divisors is an integer number (1910830740).

Almost surely, 2^28914434649 is an apocalyptic number.

It is an amenable number.

28914434649 is a deficient number, since it is larger than the sum of its proper divisors (16945503111).

28914434649 is an equidigital number, since it uses as much as digits as its factorization.

28914434649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6999411 (or 6999399 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 54.

The spelling of 28914434649 in words is "twenty-eight billion, nine hundred fourteen million, four hundred thirty-four thousand, six hundred forty-nine".