28333620 has 144 divisors (see below), whose sum is σ = 99590400. Its totient is φ = 6386688.

The previous prime is 28333619. The next prime is 28333637. The reversal of 28333620 is 2633382.

28333620 is a `hidden beast` number, since 2 + 8 + 3 + 33 + 620 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 142281 + ... + 142479.

It is an arithmetic number, because the mean of its divisors is an integer number (691600).

Almost surely, 2^28333620 is an apocalyptic number.

28333620 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 28333620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49795200).

28333620 is an abundant number, since it is smaller than the sum of its proper divisors (71256780).

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

28333620 is a wasteful number, since it uses less digits than its factorization.

28333620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 28333620 is about 5322.9334018002. The cubic root of 28333620 is about 304.8601706080.

The spelling of 28333620 in words is "twenty-eight million, three hundred thirty-three thousand, six hundred twenty".