28789268 has 12 divisors (see below), whose sum is σ = 50526420. Its totient is φ = 14353152.

The previous prime is 28789253. The next prime is 28789273. The reversal of 28789268 is 86298782.

It can be written as a sum of positive squares in 2 ways, for example, as 21049744 + 7739524 = 4588^2 + 2782^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8783 + ... + 11606.

It is an arithmetic number, because the mean of its divisors is an integer number (4210535).

Almost surely, 2^28789268 is an apocalyptic number.

It is an amenable number.

28789268 is a deficient number, since it is larger than the sum of its proper divisors (21737152).

28789268 is a wasteful number, since it uses less digits than its factorization.

28789268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20746 (or 20744 counting only the distinct ones).

The product of its digits is 774144, while the sum is 50.

The square root of 28789268 is about 5365.5631577683. The cubic root of 28789268 is about 306.4856940011.

The spelling of 28789268 in words is "twenty-eight million, seven hundred eighty-nine thousand, two hundred sixty-eight".