28423493 has 8 divisors (see below), whose sum is σ = 32520000. Its totient is φ = 24336000.

The previous prime is 28423459. The next prime is 28423513. The reversal of 28423493 is 39432482.

It is a happy number.

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 28423493 - 2¹² = 28419397 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 (28423453) 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 7 ways as a sum of consecutive naturals, for example, 7118 + ... + 10368.

It is an arithmetic number, because the mean of its divisors is an integer number (4065000).

Almost surely, 2^28423493 is an apocalyptic number.

It is an amenable number.

28423493 is a deficient number, since it is larger than the sum of its proper divisors (4096507).

28423493 is a wasteful number, since it uses less digits than its factorization.

28423493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4507.

The product of its digits is 41472, while the sum is 35.

The square root of 28423493 is about 5331.3687735890. The cubic root of 28423493 is about 305.1821647607.

The spelling of 28423493 in words is "twenty-eight million, four hundred twenty-three thousand, four hundred ninety-three".