22308328 has 24 divisors (see below), whose sum is σ = 48658050. Its totient is φ = 9560544.

The previous prime is 22308317. The next prime is 22308379. The reversal of 22308328 is 82380322.

It can be written as a sum of positive squares in only one way, i.e., 20958084 + 1350244 = 4578^2 + 1162^2 .

It is a super-3 number, since 3×22308328³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 22308296 and 22308305.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28063 + ... + 28846.

Almost surely, 2^22308328 is an apocalyptic number.

22308328 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22308328 is an abundant number, since it is smaller than the sum of its proper divisors (26349722).

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

22308328 is a wasteful number, since it uses less digits than its factorization.

22308328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56929 (or 56918 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 22308328 is about 4723.1692749678. The cubic root of 22308328 is about 281.5068758988.

The spelling of 22308328 in words is "twenty-two million, three hundred eight thousand, three hundred twenty-eight".