28933423 has 8 divisors (see below), whose sum is σ = 29842560. Its totient is φ = 28038360.

The previous prime is 28933403. The next prime is 28933427. The reversal of 28933423 is 32433982.

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 28933423 - 2⁵ = 28933391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28933427) 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, 736 + ... + 7642.

It is an arithmetic number, because the mean of its divisors is an integer number (3730320).

Almost surely, 2^28933423 is an apocalyptic number.

28933423 is a deficient number, since it is larger than the sum of its proper divisors (909137).

28933423 is an equidigital number, since it uses as much as digits as its factorization.

28933423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7037.

The product of its digits is 31104, while the sum is 34.

The square root of 28933423 is about 5378.9797359722. The cubic root of 28933423 is about 306.9963924923.

The spelling of 28933423 in words is "twenty-eight million, nine hundred thirty-three thousand, four hundred twenty-three".