22401040 has 20 divisors (see below), whose sum is σ = 52082604. Its totient is φ = 8960384.

The previous prime is 22401037. The next prime is 22401077. The reversal of 22401040 is 4010422.

It can be written as a sum of positive squares in 2 ways, for example, as 8503056 + 13897984 = 2916^2 + 3728^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 22401040.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139927 + ... + 140086.

Almost surely, 2^22401040 is an apocalyptic number.

22401040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22401040 is an abundant number, since it is smaller than the sum of its proper divisors (29681564).

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

22401040 is a wasteful number, since it uses less digits than its factorization.

22401040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280026 (or 280020 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 22401040 is about 4732.9736952576. The cubic root of 22401040 is about 281.8963118286.

Adding to 22401040 its reverse (4010422), we get a palindrome (26411462).

It can be divided in two parts, 2 and 2401040, that added together give a palindrome (2401042).

The spelling of 22401040 in words is "twenty-two million, four hundred one thousand, forty".