43572240 has 120 divisors (see below), whose sum is σ = 148513560. Its totient is φ = 11446272.

The previous prime is 43572227. The next prime is 43572247. The reversal of 43572240 is 4227534.

43572240 is a `hidden beast` number, since 435 + 7 + 224 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 6411024 + 37161216 = 2532^2 + 6096^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is not an unprimeable number, because it can be changed into a prime (43572247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52146 + ... + 52974.

It is an arithmetic number, because the mean of its divisors is an integer number (1237613).

Almost surely, 2^43572240 is an apocalyptic number.

43572240 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 43572240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74256780).

43572240 is an abundant number, since it is smaller than the sum of its proper divisors (104941320).

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

43572240 is a wasteful number, since it uses less digits than its factorization.

43572240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921 (or 912 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 43572240 is about 6600.9272075974. The cubic root of 43572240 is about 351.8870591520.

Adding to 43572240 its reverse (4227534), we get a palindrome (47799774).

The spelling of 43572240 in words is "forty-three million, five hundred seventy-two thousand, two hundred forty".