43040000 has 90 divisors (see below), whose sum is σ = 107754570. Its totient is φ = 17152000.

The previous prime is 43039979. The next prime is 43040003. The reversal of 43040000 is 4034.

It can be written as a sum of positive squares in 5 ways, for example, as 28047616 + 14992384 = 5296^2 + 3872^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43040003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 159866 + ... + 160134.

It is an arithmetic number, because the mean of its divisors is an integer number (1197273).

Almost surely, 2^43040000 is an apocalyptic number.

43040000 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 43040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53877285).

43040000 is an abundant number, since it is smaller than the sum of its proper divisors (64714570).

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

43040000 is an frugal number, since it uses more digits than its factorization.

43040000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 43040000 is about 6560.4877867427. The cubic root of 43040000 is about 350.4484048696.

Adding to 43040000 its reverse (4034), we get a palindrome (43044034).

The spelling of 43040000 in words is "forty-three million, forty thousand".