43135040 has 56 divisors (see below), whose sum is σ = 110627160. Its totient is φ = 15925248.

The previous prime is 43135039. The next prime is 43135109. The reversal of 43135040 is 4053134.

It can be written as a sum of positive squares in 4 ways, for example, as 937024 + 42198016 = 968^2 + 6496^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1025 + ... + 9344.

It is an arithmetic number, because the mean of its divisors is an integer number (1975485).

Almost surely, 2^43135040 is an apocalyptic number.

43135040 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 43135040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55313580).

43135040 is an abundant number, since it is smaller than the sum of its proper divisors (67492120).

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

43135040 is a wasteful number, since it uses less digits than its factorization.

43135040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10399 (or 10389 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 43135040 is about 6567.7271563304. The cubic root of 43135040 is about 350.7061661055.

Adding to 43135040 its reverse (4053134), we get a palindrome (47188174).

The spelling of 43135040 in words is "forty-three million, one hundred thirty-five thousand, forty".