22400436 has 48 divisors (see below), whose sum is σ = 54923904. Its totient is φ = 7092096.

The previous prime is 22400431. The next prime is 22400447. The reversal of 22400436 is 63400422.

22400436 is a Rhonda number in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22400431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76306 + ... + 76598.

It is an arithmetic number, because the mean of its divisors is an integer number (1144248).

Almost surely, 2^22400436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22400436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27461952).

22400436 is an abundant number, since it is smaller than the sum of its proper divisors (32523468).

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

22400436 is a wasteful number, since it uses less digits than its factorization.

22400436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600 (or 598 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 22400436 is about 4732.9098871624. The cubic root of 22400436 is about 281.8937782125.

Adding to 22400436 its reverse (63400422), we get a palindrome (85800858).

The spelling of 22400436 in words is "twenty-two million, four hundred thousand, four hundred thirty-six".