28423423 has 16 divisors (see below), whose sum is σ = 34546176. Its totient is φ = 22857120.

The previous prime is 28423399. The next prime is 28423441. The reversal of 28423423 is 32432482.

It is a cyclic number.

It is not a de Polignac number, because 28423423 - 2¹⁷ = 28292351 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28423391 and 28423400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28423453) 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 15 ways as a sum of consecutive naturals, for example, 6868 + ... + 10198.

It is an arithmetic number, because the mean of its divisors is an integer number (2159136).

Almost surely, 2^28423423 is an apocalyptic number.

28423423 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28423423 is a deficient number, since it is larger than the sum of its proper divisors (6122753).

28423423 is a wasteful number, since it uses less digits than its factorization.

28423423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3414.

The product of its digits is 9216, while the sum is 28.

The square root of 28423423 is about 5331.3622086667. The cubic root of 28423423 is about 305.1819142312.

The spelling of 28423423 in words is "twenty-eight million, four hundred twenty-three thousand, four hundred twenty-three".