28423420 has 24 divisors (see below), whose sum is σ = 60284448. Its totient is φ = 11256000.

The previous prime is 28423399. The next prime is 28423441. The reversal of 28423420 is 2432482.

It is an interprime number because it is at equal distance from previous prime (28423399) and next prime (28423441).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5016 + ... + 9055.

It is an arithmetic number, because the mean of its divisors is an integer number (2511852).

Almost surely, 2^28423420 is an apocalyptic number.

28423420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28423420 is an abundant number, since it is smaller than the sum of its proper divisors (31861028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28423420 is a wasteful number, since it uses less digits than its factorization.

28423420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14181 (or 14179 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 28423420 is about 5331.3619273128. The cubic root of 28423420 is about 305.1819034942.

The spelling of 28423420 in words is "twenty-eight million, four hundred twenty-three thousand, four hundred twenty".