43061840 has 40 divisors (see below), whose sum is σ = 100875240. Its totient is φ = 17094656.

The previous prime is 43061831. The next prime is 43061857. The reversal of 43061840 is 4816034.

It can be written as a sum of positive squares in 4 ways, for example, as 1175056 + 41886784 = 1084^2 + 6472^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8996 + ... + 12924.

It is an arithmetic number, because the mean of its divisors is an integer number (2521881).

Almost surely, 2^43061840 is an apocalyptic number.

43061840 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 43061840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50437620).

43061840 is an abundant number, since it is smaller than the sum of its proper divisors (57813400).

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

43061840 is a wasteful number, since it uses less digits than its factorization.

43061840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4079 (or 4073 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 43061840 is about 6562.1520860157. The cubic root of 43061840 is about 350.5076714350.

Adding to 43061840 its reverse (4816034), we get a palindrome (47877874).

The spelling of 43061840 in words is "forty-three million, sixty-one thousand, eight hundred forty".