22214720 has 56 divisors (see below), whose sum is σ = 57716928. Its totient is φ = 8076800.

The previous prime is 22214719. The next prime is 22214729. The reversal of 22214720 is 2741222.

It is a happy number.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22214692 and 22214701.

It is not an unprimeable number, because it can be changed into a prime (22214729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365 + ... + 6675.

Almost surely, 2^22214720 is an apocalyptic number.

22214720 is a gapful number since it is divisible by the number (20) 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 22214720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28858464).

22214720 is an abundant number, since it is smaller than the sum of its proper divisors (35502208).

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

22214720 is a wasteful number, since it uses less digits than its factorization.

22214720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6339 (or 6329 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 22214720 is about 4713.2494099082. The cubic root of 22214720 is about 281.1125801098.

Adding to 22214720 its reverse (2741222), we get a palindrome (24955942).

The spelling of 22214720 in words is "twenty-two million, two hundred fourteen thousand, seven hundred twenty".