28433333 has 4 divisors (see below), whose sum is σ = 30105900. Its totient is φ = 26760768.

The previous prime is 28433303. The next prime is 28433341. The reversal of 28433333 is 33333482.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17825284 + 10608049 = 4222^2 + 3257^2 .

It is a cyclic number.

It is not a de Polignac number, because 28433333 - 2⁶ = 28433269 is a prime.

It is a Duffinian number.

28433333 is a modest number, since divided by 3333 gives 2843 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 28433296 and 28433305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28433303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 836258 + ... + 836291.

It is an arithmetic number, because the mean of its divisors is an integer number (7526475).

Almost surely, 2^28433333 is an apocalyptic number.

It is an amenable number.

28433333 is a deficient number, since it is larger than the sum of its proper divisors (1672567).

28433333 is a wasteful number, since it uses less digits than its factorization.

28433333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672566.

The product of its digits is 15552, while the sum is 29.

The square root of 28433333 is about 5332.2915336654. The cubic root of 28433333 is about 305.2173779560.

The spelling of 28433333 in words is "twenty-eight million, four hundred thirty-three thousand, three hundred thirty-three".