43222440 has 32 divisors (see below), whose sum is σ = 129667680. Its totient is φ = 11525952.

The previous prime is 43222411. The next prime is 43222447. The reversal of 43222440 is 4422234.

It is not an unprimeable number, because it can be changed into a prime (43222447) 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 7 ways as a sum of consecutive naturals, for example, 179974 + ... + 180213.

It is an arithmetic number, because the mean of its divisors is an integer number (4052115).

Almost surely, 2^43222440 is an apocalyptic number.

43222440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43222440 is an abundant number, since it is smaller than the sum of its proper divisors (86445240).

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

43222440 is a wasteful number, since it uses less digits than its factorization.

43222440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360201 (or 360197 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 43222440 is about 6574.3775370753. The cubic root of 43222440 is about 350.9428726598.

Adding to 43222440 its reverse (4422234), we get a palindrome (47644674).

The spelling of 43222440 in words is "forty-three million, two hundred twenty-two thousand, four hundred forty".