28494123 has 16 divisors (see below), whose sum is σ = 43501056. Its totient is φ = 16251840.

The previous prime is 28494121. The next prime is 28494127. The reversal of 28494123 is 32149482.

It is not a de Polignac number, because 28494123 - 2¹ = 28494121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28494121) 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 15 ways as a sum of consecutive naturals, for example, 15090 + ... + 16872.

It is an arithmetic number, because the mean of its divisors is an integer number (2718816).

Almost surely, 2^28494123 is an apocalyptic number.

28494123 is a deficient number, since it is larger than the sum of its proper divisors (15006933).

28494123 is a wasteful number, since it uses less digits than its factorization.

28494123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2554.

The product of its digits is 13824, while the sum is 33.

The square root of 28494123 is about 5337.9886661551. The cubic root of 28494123 is about 305.4347397083.

The spelling of 28494123 in words is "twenty-eight million, four hundred ninety-four thousand, one hundred twenty-three".