28280704949 has 16 divisors (see below), whose sum is σ = 33279792000. Its totient is φ = 23524737984.

The previous prime is 28280704927. The next prime is 28280704999. The reversal of 28280704949 is 94940708282.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28280704949 - 2⁸ = 28280704693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28280704949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28280704919) 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, 39599 + ... + 241100.

It is an arithmetic number, because the mean of its divisors is an integer number (2079987000).

Almost surely, 2^28280704949 is an apocalyptic number.

It is an amenable number.

28280704949 is a deficient number, since it is larger than the sum of its proper divisors (4999087051).

28280704949 is a wasteful number, since it uses less digits than its factorization.

28280704949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281132.

The product of its (nonzero) digits is 2322432, while the sum is 53.

The spelling of 28280704949 in words is "twenty-eight billion, two hundred eighty million, seven hundred four thousand, nine hundred forty-nine".