22405470 has 64 divisors (see below), whose sum is σ = 55696896. Its totient is φ = 5765760.

The previous prime is 22405463. The next prime is 22405499. The reversal of 22405470 is 7450422.

It is a self number, because there is not a number n which added to its sum of digits gives 22405470.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 142632 + ... + 142788.

It is an arithmetic number, because the mean of its divisors is an integer number (870264).

Almost surely, 2^22405470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22405470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27848448).

22405470 is an abundant number, since it is smaller than the sum of its proper divisors (33291426).

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

22405470 is a wasteful number, since it uses less digits than its factorization.

22405470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305.

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 22405470 is about 4733.4416654270. The cubic root of 22405470 is about 281.9148930842.

Adding to 22405470 its reverse (7450422), we get a palindrome (29855892).

The spelling of 22405470 in words is "twenty-two million, four hundred five thousand, four hundred seventy".