22432140 has 120 divisors (see below), whose sum is σ = 71839152. Its totient is φ = 5857920.

The previous prime is 22432133. The next prime is 22432147. The reversal of 22432140 is 4123422.

It is an interprime number because it is at equal distance from previous prime (22432133) and next prime (22432147).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22432147) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 98707 + ... + 98933.

Almost surely, 2^22432140 is an apocalyptic number.

22432140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22432140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35919576).

22432140 is an abundant number, since it is smaller than the sum of its proper divisors (49407012).

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

22432140 is a wasteful number, since it uses less digits than its factorization.

22432140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 22432140 is about 4736.2580166203. The cubic root of 22432140 is about 282.0267063888.

Adding to 22432140 its reverse (4123422), we get a palindrome (26555562).

The spelling of 22432140 in words is "twenty-two million, four hundred thirty-two thousand, one hundred forty".