28433000 has 32 divisors (see below), whose sum is σ = 66535560. Its totient is φ = 11372800.

The previous prime is 28432997. The next prime is 28433011. The reversal of 28433000 is 33482.

It can be written as a sum of positive squares in 4 ways, for example, as 6959044 + 21473956 = 2638^2 + 4634^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

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, 13217 + ... + 15216.

Almost surely, 2^28433000 is an apocalyptic number.

28433000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28433000 is an abundant number, since it is smaller than the sum of its proper divisors (38102560).

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

28433000 is a wasteful number, since it uses less digits than its factorization.

28433000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28454 (or 28440 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 28433000 is about 5332.2603087246. The cubic root of 28433000 is about 305.2161864228.

Adding to 28433000 its reverse (33482), we get a palindrome (28466482).

The spelling of 28433000 in words is "twenty-eight million, four hundred thirty-three thousand".