28939265 has 8 divisors (see below), whose sum is σ = 34759680. Its totient is φ = 23129712.

The previous prime is 28939259. The next prime is 28939307. The reversal of 28939265 is 56293982.

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 28939265 - 2¹⁰ = 28938241 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5312 + ... + 9278.

It is an arithmetic number, because the mean of its divisors is an integer number (4344960).

Almost surely, 2^28939265 is an apocalyptic number.

It is an amenable number.

28939265 is a deficient number, since it is larger than the sum of its proper divisors (5820415).

28939265 is a wasteful number, since it uses less digits than its factorization.

28939265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5431.

The product of its digits is 233280, while the sum is 44.

The square root of 28939265 is about 5379.5227483486. The cubic root of 28939265 is about 307.0170531682.

The spelling of 28939265 in words is "twenty-eight million, nine hundred thirty-nine thousand, two hundred sixty-five".