28858923 has 28 divisors (see below), whose sum is σ = 44699328. Its totient is φ = 18604080.

The previous prime is 28858919. The next prime is 28858961. The reversal of 28858923 is 32985882.

It is not a de Polignac number, because 28858923 - 2² = 28858919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28858903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 21961 + ... + 23237.

Almost surely, 2^28858923 is an apocalyptic number.

28858923 is a deficient number, since it is larger than the sum of its proper divisors (15840405).

28858923 is an equidigital number, since it uses as much as digits as its factorization.

28858923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326 (or 1311 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 28858923 is about 5372.0501673011. The cubic root of 28858923 is about 306.7326733836.

The spelling of 28858923 in words is "twenty-eight million, eight hundred fifty-eight thousand, nine hundred twenty-three".