22448340 has 144 divisors (see below), whose sum is σ = 73382400. Its totient is φ = 5754240.

The previous prime is 22448339. The next prime is 22448341. The reversal of 22448340 is 4384422.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22448339) and next prime (22448341).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22448341) 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 47 ways as a sum of consecutive naturals, for example, 150586 + ... + 150734.

It is an arithmetic number, because the mean of its divisors is an integer number (509600).

Almost surely, 2^22448340 is an apocalyptic number.

22448340 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 22448340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36691200).

22448340 is an abundant number, since it is smaller than the sum of its proper divisors (50934060).

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

22448340 is a wasteful number, since it uses less digits than its factorization.

22448340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 22448340 is about 4737.9679188445. The cubic root of 22448340 is about 282.0945812215.

The spelling of 22448340 in words is "twenty-two million, four hundred forty-eight thousand, three hundred forty".