22271388 has 12 divisors (see below), whose sum is σ = 51966600. Its totient is φ = 7423792.

The previous prime is 22271341. The next prime is 22271393. The reversal of 22271388 is 88317222.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 927963 + ... + 927986.

It is an arithmetic number, because the mean of its divisors is an integer number (4330550).

Almost surely, 2^22271388 is an apocalyptic number.

It is an amenable number.

22271388 is an abundant number, since it is smaller than the sum of its proper divisors (29695212).

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

22271388 is a wasteful number, since it uses less digits than its factorization.

22271388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855956 (or 1855954 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 22271388 is about 4719.2571449329. The cubic root of 22271388 is about 281.3514091593.

The spelling of 22271388 in words is "twenty-two million, two hundred seventy-one thousand, three hundred eighty-eight".