28864263 has 8 divisors (see below), whose sum is σ = 38544768. Its totient is φ = 19213304.

The previous prime is 28864259. The next prime is 28864267. The reversal of 28864263 is 36246882.

It is an interprime number because it is at equal distance from previous prime (28864259) and next prime (28864267).

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 28864263 - 2² = 28864259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28864267) 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, 4995 + ... + 9092.

It is an arithmetic number, because the mean of its divisors is an integer number (4818096).

Almost surely, 2^28864263 is an apocalyptic number.

28864263 is a deficient number, since it is larger than the sum of its proper divisors (9680505).

28864263 is a wasteful number, since it uses less digits than its factorization.

28864263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14773.

The product of its digits is 110592, while the sum is 39.

The square root of 28864263 is about 5372.5471612635. The cubic root of 28864263 is about 306.7515912929.

The spelling of 28864263 in words is "twenty-eight million, eight hundred sixty-four thousand, two hundred sixty-three".