43864240 has 160 divisors (see below), whose sum is σ = 125527680. Its totient is φ = 13934592.

The previous prime is 43864237. The next prime is 43864253. The reversal of 43864240 is 4246834.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 600844 + ... + 600916.

It is an arithmetic number, because the mean of its divisors is an integer number (784548).

Almost surely, 2^43864240 is an apocalyptic number.

43864240 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 43864240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62763840).

43864240 is an abundant number, since it is smaller than the sum of its proper divisors (81663440).

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

43864240 is a wasteful number, since it uses less digits than its factorization.

43864240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 43864240 is about 6623.0083798830. The cubic root of 43864240 is about 352.6713684803.

The spelling of 43864240 in words is "forty-three million, eight hundred sixty-four thousand, two hundred forty".