28206332 has 48 divisors (see below), whose sum is σ = 65173248. Its totient is φ = 10341120.

The previous prime is 28206329. The next prime is 28206337. The reversal of 28206332 is 23360282.

It is a happy number.

It is a super-3 number, since 3×28206332³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28206337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2543 + ... + 7929.

It is an arithmetic number, because the mean of its divisors is an integer number (1357776).

Almost surely, 2^28206332 is an apocalyptic number.

28206332 is a gapful number since it is divisible by the number (22) 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 28206332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32586624).

28206332 is an abundant number, since it is smaller than the sum of its proper divisors (36966916).

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

28206332 is a wasteful number, since it uses less digits than its factorization.

28206332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5426 (or 5424 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 28206332 is about 5310.9633777687. The cubic root of 28206332 is about 304.4029599744.

The spelling of 28206332 in words is "twenty-eight million, two hundred six thousand, three hundred thirty-two".