28423424 has 18 divisors (see below), whose sum is σ = 56736330. Its totient is φ = 14211584.

The previous prime is 28423399. The next prime is 28423441. The reversal of 28423424 is 42432482.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17977600 + 10445824 = 4240^2 + 3232^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55259 + ... + 55770.

Almost surely, 2^28423424 is an apocalyptic number.

It is an amenable number.

28423424 is a deficient number, since it is larger than the sum of its proper divisors (28312906).

28423424 is an equidigital number, since it uses as much as digits as its factorization.

28423424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111045 (or 111031 counting only the distinct ones).

The product of its digits is 12288, while the sum is 29.

The square root of 28423424 is about 5331.3623024514. The cubic root of 28423424 is about 305.1819178102.

The spelling of 28423424 in words is "twenty-eight million, four hundred twenty-three thousand, four hundred twenty-four".