22143128 has 32 divisors (see below), whose sum is σ = 47712000. Its totient is φ = 9437472.

The previous prime is 22143127. The next prime is 22143133. The reversal of 22143128 is 82134122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22143127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10151 + ... + 12137.

It is an arithmetic number, because the mean of its divisors is an integer number (1491000).

Almost surely, 2^22143128 is an apocalyptic number.

22143128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22143128 is an abundant number, since it is smaller than the sum of its proper divisors (25568872).

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

22143128 is a wasteful number, since it uses less digits than its factorization.

22143128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2199 (or 2195 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

The square root of 22143128 is about 4705.6485206611. The cubic root of 22143128 is about 280.8102719976.

The spelling of 22143128 in words is "twenty-two million, one hundred forty-three thousand, one hundred twenty-eight".