22191408 has 50 divisors (see below), whose sum is σ = 64232124. Its totient is φ = 7396704.

The previous prime is 22191401. The next prime is 22191427. The reversal of 22191408 is 80419122.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (22191401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7266 + ... + 9857.

Almost surely, 2^22191408 is an apocalyptic number.

It is an amenable number.

22191408 is an abundant number, since it is smaller than the sum of its proper divisors (42040716).

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

22191408 is a wasteful number, since it uses less digits than its factorization.

22191408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17143 (or 17128 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 22191408 is about 4710.7757322972. The cubic root of 22191408 is about 281.0142130491.

The spelling of 22191408 in words is "twenty-two million, one hundred ninety-one thousand, four hundred eight".