28433800 has 24 divisors (see below), whose sum is σ = 66109050. Its totient is φ = 11373440.

The previous prime is 28433791. The next prime is 28433807. The reversal of 28433800 is 833482.

It can be written as a sum of positive squares in 3 ways, for example, as 19660356 + 8773444 = 4434^2 + 2962^2 .

It is not an unprimeable number, because it can be changed into a prime (28433807) 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 5 ways as a sum of consecutive naturals, for example, 70885 + ... + 71284.

Almost surely, 2^28433800 is an apocalyptic number.

28433800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28433800 is an abundant number, since it is smaller than the sum of its proper divisors (37675250).

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

28433800 is a wasteful number, since it uses less digits than its factorization.

28433800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142185 (or 142176 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 28433800 is about 5332.3353232894. The cubic root of 28433800 is about 305.2190489494.

The spelling of 28433800 in words is "twenty-eight million, four hundred thirty-three thousand, eight hundred".