22200040 has 32 divisors (see below), whose sum is σ = 51115680. Its totient is φ = 8672832.

The previous prime is 22200023. The next prime is 22200043. The reversal of 22200040 is 4000222.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (22200043) 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, 4734 + ... + 8173.

It is an arithmetic number, because the mean of its divisors is an integer number (1597365).

Almost surely, 2^22200040 is an apocalyptic number.

22200040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22200040 is an abundant number, since it is smaller than the sum of its proper divisors (28915640).

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

22200040 is a wasteful number, since it uses less digits than its factorization.

22200040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12961 (or 12957 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 22200040 is about 4711.6918405176. The cubic root of 22200040 is about 281.0506445700.

Adding to 22200040 its reverse (4000222), we get a palindrome (26200262).

The spelling of 22200040 in words is "twenty-two million, two hundred thousand, forty".