28433520 has 240 divisors, whose sum is σ = 106546752. Its totient is φ = 6758400.

The previous prime is 28433507. The next prime is 28433533. The reversal of 28433520 is 2533482.

It is an interprime number because it is at equal distance from previous prime (28433507) and next prime (28433533).

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 281470 + ... + 281570.

Almost surely, 2^28433520 is an apocalyptic number.

28433520 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 28433520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53273376).

28433520 is an abundant number, since it is smaller than the sum of its proper divisors (78113232).

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

28433520 is a wasteful number, since it uses less digits than its factorization.

28433520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 28433520 is about 5332.3090683118. The cubic root of 28433520 is about 305.2180470712.

The spelling of 28433520 in words is "twenty-eight million, four hundred thirty-three thousand, five hundred twenty".