22290540 has 24 divisors (see below), whose sum is σ = 62413680. Its totient is φ = 5944128.

The previous prime is 22290529. The next prime is 22290551. The reversal of 22290540 is 4509222.

It is an interprime number because it is at equal distance from previous prime (22290529) and next prime (22290551).

It is a self number, because there is not a number n which added to its sum of digits gives 22290540.

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, 185695 + ... + 185814.

It is an arithmetic number, because the mean of its divisors is an integer number (2600570).

Almost surely, 2^22290540 is an apocalyptic number.

22290540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22290540 is an abundant number, since it is smaller than the sum of its proper divisors (40123140).

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

22290540 is a wasteful number, since it uses less digits than its factorization.

22290540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371521 (or 371519 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 22290540 is about 4721.2858418020. The cubic root of 22290540 is about 281.4320342548.

Adding to 22290540 its reverse (4509222), we get a palindrome (26799762).

The spelling of 22290540 in words is "twenty-two million, two hundred ninety thousand, five hundred forty".