22129404 has 96 divisors (see below), whose sum is σ = 60673536. Its totient is φ = 6209280.

The previous prime is 22129361. The next prime is 22129409. The reversal of 22129404 is 40492122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22129409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112234 + ... + 112430.

It is an arithmetic number, because the mean of its divisors is an integer number (632016).

Almost surely, 2^22129404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22129404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30336768).

22129404 is an abundant number, since it is smaller than the sum of its proper divisors (38544132).

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

22129404 is a wasteful number, since it uses less digits than its factorization.

22129404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 273 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 22129404 is about 4704.1900471813. The cubic root of 22129404 is about 280.7522459193.

The spelling of 22129404 in words is "twenty-two million, one hundred twenty-nine thousand, four hundred four".