22291872 has 24 divisors (see below), whose sum is σ = 58516416. Its totient is φ = 7430592.

The previous prime is 22291831. The next prime is 22291873. The reversal of 22291872 is 27819222.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (22291873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116008 + ... + 116199.

It is an arithmetic number, because the mean of its divisors is an integer number (2438184).

Almost surely, 2^22291872 is an apocalyptic number.

It is an amenable number.

22291872 is an abundant number, since it is smaller than the sum of its proper divisors (36224544).

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

22291872 is a wasteful number, since it uses less digits than its factorization.

22291872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232220 (or 232212 counting only the distinct ones).

The product of its digits is 8064, while the sum is 33.

The square root of 22291872 is about 4721.4269029606. The cubic root of 22291872 is about 281.4376399213.

The spelling of 22291872 in words is "twenty-two million, two hundred ninety-one thousand, eight hundred seventy-two".