28817633 has 8 divisors (see below), whose sum is σ = 31355688. Its totient is φ = 26325504.

The previous prime is 28817603. The next prime is 28817639. The reversal of 28817633 is 33671882.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2209 + 28815424 = 47^2 + 5368^2 .

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 28817633 - 2⁸ = 28817377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28817639) 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, 10166 + ... + 12687.

It is an arithmetic number, because the mean of its divisors is an integer number (3919461).

Almost surely, 2^28817633 is an apocalyptic number.

It is an amenable number.

28817633 is a deficient number, since it is larger than the sum of its proper divisors (2538055).

28817633 is a wasteful number, since it uses less digits than its factorization.

28817633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22963.

The product of its digits is 48384, while the sum is 38.

The square root of 28817633 is about 5368.2057523906. The cubic root of 28817633 is about 306.5863172976.

The spelling of 28817633 in words is "twenty-eight million, eight hundred seventeen thousand, six hundred thirty-three".