28433856 has 56 divisors (see below), whose sum is σ = 82076544. Its totient is φ = 8615680.

The previous prime is 28433837. The next prime is 28433857. The reversal of 28433856 is 65833482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28433857) 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 7 ways as a sum of consecutive naturals, for example, 4620 + ... + 8843.

Almost surely, 2^28433856 is an apocalyptic number.

It is an amenable number.

28433856 is an abundant number, since it is smaller than the sum of its proper divisors (53642688).

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

28433856 is a wasteful number, since it uses less digits than its factorization.

28433856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13489 (or 13479 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 28433856 is about 5332.3405742694. The cubic root of 28433856 is about 305.2192493243.

The spelling of 28433856 in words is "twenty-eight million, four hundred thirty-three thousand, eight hundred fifty-six".