28688000849 has 8 divisors (see below), whose sum is σ = 29125031592. Its totient is φ = 28252160640.

The previous prime is 28688000843. The next prime is 28688000879. The reversal of 28688000849 is 94800088682.

It can be written as a sum of positive squares in 4 ways, for example, as 3951002449 + 24736998400 = 62857^2 + 157280^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28688000849 - 2⁴ = 28688000833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28688000849.

It is not an unprimeable number, because it can be changed into a prime (28688000843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249014 + ... + 345519.

It is an arithmetic number, because the mean of its divisors is an integer number (3640628949).

Almost surely, 2^28688000849 is an apocalyptic number.

It is an amenable number.

28688000849 is a deficient number, since it is larger than the sum of its proper divisors (437030743).

28688000849 is an equidigital number, since it uses as much as digits as its factorization.

28688000849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595267.

The product of its (nonzero) digits is 1769472, while the sum is 53.

The spelling of 28688000849 in words is "twenty-eight billion, six hundred eighty-eight million, eight hundred forty-nine", and thus it is an aban number.