43045640 has 96 divisors (see below), whose sum is σ = 111922560. Its totient is φ = 14774400.

The previous prime is 43045637. The next prime is 43045663. The reversal of 43045640 is 4654034.

It is a zygodrome in base 3.

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, 158705 + ... + 158975.

It is an arithmetic number, because the mean of its divisors is an integer number (1165860).

Almost surely, 2^43045640 is an apocalyptic number.

43045640 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 43045640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55961280).

43045640 is an abundant number, since it is smaller than the sum of its proper divisors (68876920).

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

43045640 is a wasteful number, since it uses less digits than its factorization.

43045640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 43045640 is about 6560.9176187482. The cubic root of 43045640 is about 350.4637118915.

Adding to 43045640 its reverse (4654034), we get a palindrome (47699674).

The spelling of 43045640 in words is "forty-three million, forty-five thousand, six hundred forty".