43115040 has 144 divisors (see below), whose sum is σ = 149385600. Its totient is φ = 11321856.

The previous prime is 43115029. The next prime is 43115057. The reversal of 43115040 is 4051134.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

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 23 ways as a sum of consecutive naturals, for example, 113571 + ... + 113949.

It is an arithmetic number, because the mean of its divisors is an integer number (1037400).

Almost surely, 2^43115040 is an apocalyptic number.

43115040 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 43115040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74692800).

43115040 is an abundant number, since it is smaller than the sum of its proper divisors (106270560).

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

43115040 is a wasteful number, since it uses less digits than its factorization.

43115040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479 (or 468 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 43115040 is about 6566.2043830511. The cubic root of 43115040 is about 350.6519548992.

Adding to 43115040 its reverse (4051134), we get a palindrome (47166174).

The spelling of 43115040 in words is "forty-three million, one hundred fifteen thousand, forty".