22194864 has 80 divisors (see below), whose sum is σ = 64579200. Its totient is φ = 7297344.

The previous prime is 22194859. The next prime is 22194883. The reversal of 22194864 is 46849122.

It is a super-2 number, since 2×22194864² = 985223975956992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 35547 + ... + 36165.

It is an arithmetic number, because the mean of its divisors is an integer number (807240).

Almost surely, 2^22194864 is an apocalyptic number.

22194864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22194864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32289600).

22194864 is an abundant number, since it is smaller than the sum of its proper divisors (42384336).

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

22194864 is a wasteful number, since it uses less digits than its factorization.

22194864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719 (or 707 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 22194864 is about 4711.1425365828. The cubic root of 22194864 is about 281.0288002970.

The spelling of 22194864 in words is "twenty-two million, one hundred ninety-four thousand, eight hundred sixty-four".