43422240 has 96 divisors (see below), whose sum is σ = 139116096. Its totient is φ = 11381760.

The previous prime is 43422173. The next prime is 43422241. The reversal of 43422240 is 4222434.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (43422241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28539 + ... + 30021.

It is an arithmetic number, because the mean of its divisors is an integer number (1449126).

Almost surely, 2^43422240 is an apocalyptic number.

43422240 is a gapful number since it is divisible by the number (40) 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 43422240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69558048).

43422240 is an abundant number, since it is smaller than the sum of its proper divisors (95693856).

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

43422240 is a wasteful number, since it uses less digits than its factorization.

43422240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562 (or 1554 counting only the distinct ones).

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

The square root of 43422240 is about 6589.5553719504. Note that the first 3 decimals coincide. The cubic root of 43422240 is about 351.4827975963.

Adding to 43422240 its reverse (4222434), we get a palindrome (47644674).

The spelling of 43422240 in words is "forty-three million, four hundred twenty-two thousand, two hundred forty".