28899844 has 12 divisors (see below), whose sum is σ = 51048144. Its totient is φ = 14314664.

The previous prime is 28899841. The next prime is 28899869. The reversal of 28899844 is 44899882.

It is a junction number, because it is equal to n+sod(n) for n = 28899791 and 28899800.

It is not an unprimeable number, because it can be changed into a prime (28899841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33334 + ... + 34189.

It is an arithmetic number, because the mean of its divisors is an integer number (4254012).

Almost surely, 2^28899844 is an apocalyptic number.

It is an amenable number.

28899844 is a deficient number, since it is larger than the sum of its proper divisors (22148300).

28899844 is a wasteful number, since it uses less digits than its factorization.

28899844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67634 (or 67632 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 52.

The square root of 28899844 is about 5375.8575129927. The cubic root of 28899844 is about 306.8775838470.

The spelling of 28899844 in words is "twenty-eight million, eight hundred ninety-nine thousand, eight hundred forty-four".