43122240 has 448 divisors, whose sum is σ = 187269120. Its totient is φ = 9123840.

The previous prime is 43122227. The next prime is 43122259. The reversal of 43122240 is 4222134.

It is a tau number, because it is divible by the number of its divisors (448).

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1391025 + ... + 1391055.

Almost surely, 2^43122240 is an apocalyptic number.

43122240 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 43122240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93634560).

43122240 is an abundant number, since it is smaller than the sum of its proper divisors (144146880).

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

43122240 is a wasteful number, since it uses less digits than its factorization.

43122240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 71 counting only the distinct ones).

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

The square root of 43122240 is about 6566.7526221109. The cubic root of 43122240 is about 350.6714728644.

Adding to 43122240 its reverse (4222134), we get a palindrome (47344374).

The spelling of 43122240 in words is "forty-three million, one hundred twenty-two thousand, two hundred forty".