28298923 has 8 divisors (see below), whose sum is σ = 29926400. Its totient is φ = 26685288.

The previous prime is 28298917. The next prime is 28298927. The reversal of 28298923 is 32989282.

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 28298923 - 2²¹ = 26201771 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28298923.

It is not an unprimeable number, because it can be changed into a prime (28298927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 898 + ... + 7576.

It is an arithmetic number, because the mean of its divisors is an integer number (3740800).

Almost surely, 2^28298923 is an apocalyptic number.

28298923 is a deficient number, since it is larger than the sum of its proper divisors (1627477).

28298923 is a wasteful number, since it uses less digits than its factorization.

28298923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6921.

The product of its digits is 124416, while the sum is 43.

The square root of 28298923 is about 5319.6732042485. The cubic root of 28298923 is about 304.7356771138.

The spelling of 28298923 in words is "twenty-eight million, two hundred ninety-eight thousand, nine hundred twenty-three".