22036640 has 48 divisors (see below), whose sum is σ = 53288928. Its totient is φ = 8606976.

The previous prime is 22036627. The next prime is 22036649. The reversal of 22036640 is 4663022.

It is a super-2 number, since 2×22036640² = 971227004979200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22036649) 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, 5279 + ... + 8481.

It is an arithmetic number, because the mean of its divisors is an integer number (1110186).

Almost surely, 2^22036640 is an apocalyptic number.

22036640 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 22036640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26644464).

22036640 is an abundant number, since it is smaller than the sum of its proper divisors (31252288).

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

22036640 is a wasteful number, since it uses less digits than its factorization.

22036640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3261 (or 3253 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 22036640 is about 4694.3199720513. The cubic root of 22036640 is about 280.3594024264.

Adding to 22036640 its reverse (4663022), we get a palindrome (26699662).

The spelling of 22036640 in words is "twenty-two million, thirty-six thousand, six hundred forty".