28423000 has 64 divisors (see below), whose sum is σ = 68159520. Its totient is φ = 11088000.

The previous prime is 28422991. The next prime is 28423007. The reversal of 28423000 is 32482.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28423007) 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, 42670 + ... + 43330.

Almost surely, 2^28423000 is an apocalyptic number.

28423000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28423000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34079760).

28423000 is an abundant number, since it is smaller than the sum of its proper divisors (39736520).

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

28423000 is a wasteful number, since it uses less digits than its factorization.

28423000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725 (or 711 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 28423000 is about 5331.3225376073. The cubic root of 28423000 is about 305.1804003086.

Adding to 28423000 its reverse (32482), we get a palindrome (28455482).

The spelling of 28423000 in words is "twenty-eight million, four hundred twenty-three thousand".