22002040 has 32 divisors (see below), whose sum is σ = 49643280. Its totient is φ = 8776192.

The previous prime is 22002031. The next prime is 22002061. The reversal of 22002040 is 4020022.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22032 + ... + 23008.

Almost surely, 2^22002040 is an apocalyptic number.

22002040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22002040 is an abundant number, since it is smaller than the sum of its proper divisors (27641240).

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

22002040 is a wasteful number, since it uses less digits than its factorization.

22002040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1551 (or 1547 counting only the distinct ones).

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

The square root of 22002040 is about 4690.6332195131. The cubic root of 22002040 is about 280.2125936467.

Adding to 22002040 its reverse (4020022), we get a palindrome (26022062).

The spelling of 22002040 in words is "twenty-two million, two thousand, forty".