22328172 has 18 divisors (see below), whose sum is σ = 56440748. Its totient is φ = 7442712.

The previous prime is 22328143. The next prime is 22328197. The reversal of 22328172 is 27182322.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×22328172³ (a number of 23 digits) contains 333 as substring.

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 5 ways as a sum of consecutive naturals, for example, 310078 + ... + 310149.

Almost surely, 2^22328172 is an apocalyptic number.

It is an amenable number.

22328172 is an abundant number, since it is smaller than the sum of its proper divisors (34112576).

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

22328172 is a wasteful number, since it uses less digits than its factorization.

22328172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620237 (or 620232 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 22328172 is about 4725.2695161229. The cubic root of 22328172 is about 281.5903210721.

It can be divided in two parts, 22328 and 172, that added together give a square (22500 = 150²).

The spelling of 22328172 in words is "twenty-two million, three hundred twenty-eight thousand, one hundred seventy-two".