22129458 has 32 divisors (see below), whose sum is σ = 48455232. Its totient is φ = 6696000.

The previous prime is 22129423. The next prime is 22129501. The reversal of 22129458 is 85492122.

It is a super-2 number, since 2×22129458² = 979425822747528, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2433 + ... + 7083.

It is an arithmetic number, because the mean of its divisors is an integer number (1514226).

Almost surely, 2^22129458 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22129458, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24227616).

22129458 is an abundant number, since it is smaller than the sum of its proper divisors (26325774).

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

22129458 is a wasteful number, since it uses less digits than its factorization.

22129458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4730.

The product of its digits is 11520, while the sum is 33.

The square root of 22129458 is about 4704.1957867419. The cubic root of 22129458 is about 280.7524742823.

The spelling of 22129458 in words is "twenty-two million, one hundred twenty-nine thousand, four hundred fifty-eight".