22032240 has 40 divisors (see below), whose sum is σ = 68300688. Its totient is φ = 5875200.

The previous prime is 22032239. The next prime is 22032253. The reversal of 22032240 is 4223022.

It is a tau number, because it is divible by the number of its divisors (40).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45661 + ... + 46140.

Almost surely, 2^22032240 is an apocalyptic number.

22032240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22032240 is an abundant number, since it is smaller than the sum of its proper divisors (46268448).

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

22032240 is a wasteful number, since it uses less digits than its factorization.

22032240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91817 (or 91811 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 22032240 is about 4693.8512971759. The cubic root of 22032240 is about 280.3407416342.

Adding to 22032240 its reverse (4223022), we get a palindrome (26255262).

The spelling of 22032240 in words is "twenty-two million, thirty-two thousand, two hundred forty".