22102440 has 32 divisors (see below), whose sum is σ = 66307680. Its totient is φ = 5893952.

The previous prime is 22102439. The next prime is 22102441. The reversal of 22102440 is 4420122.

It is an interprime number because it is at equal distance from previous prime (22102439) and next prime (22102441).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (22102441) 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, 91974 + ... + 92213.

It is an arithmetic number, because the mean of its divisors is an integer number (2072115).

Almost surely, 2^22102440 is an apocalyptic number.

22102440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22102440 is an abundant number, since it is smaller than the sum of its proper divisors (44205240).

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

22102440 is a wasteful number, since it uses less digits than its factorization.

22102440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184201 (or 184197 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 22102440 is about 4701.3232179887. The cubic root of 22102440 is about 280.6381702408.

Adding to 22102440 its reverse (4420122), we get a palindrome (26522562).

The spelling of 22102440 in words is "twenty-two million, one hundred two thousand, four hundred forty".