28000049 has 16 divisors (see below), whose sum is σ = 35358720. Its totient is φ = 21537360.

The previous prime is 28000031. The next prime is 28000061. The reversal of 28000049 is 94000082.

It is a cyclic number.

It is not a de Polignac number, because 28000049 - 2¹⁶ = 27934513 is a prime.

It is a Duffinian number.

28000049 is a modest number, since divided by 49 gives 28 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 27999988 and 28000033.

It is not an unprimeable number, because it can be changed into a prime (28000019) 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, 3782 + ... + 8384.

It is an arithmetic number, because the mean of its divisors is an integer number (2209920).

Almost surely, 2^28000049 is an apocalyptic number.

It is an amenable number.

28000049 is a deficient number, since it is larger than the sum of its proper divisors (7358671).

28000049 is a wasteful number, since it uses less digits than its factorization.

28000049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4700.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 28000049 is about 5291.5072521919. The cubic root of 28000049 is about 303.6590743218.

The spelling of 28000049 in words is "twenty-eight million, forty-nine", and thus it is an aban number and an uban number.