43078340 has 72 divisors (see below), whose sum is σ = 99799560. Its totient is φ = 15597568.

The previous prime is 43078309. The next prime is 43078349. The reversal of 43078340 is 4387034.

It can be written as a sum of positive squares in 12 ways, for example, as 1295044 + 41783296 = 1138^2 + 6464^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (43078349) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 167492 + ... + 167748.

It is an arithmetic number, because the mean of its divisors is an integer number (1386105).

Almost surely, 2^43078340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43078340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49899780).

43078340 is an abundant number, since it is smaller than the sum of its proper divisors (56721220).

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

43078340 is a wasteful number, since it uses less digits than its factorization.

43078340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 43078340 is about 6563.4091751162. The cubic root of 43078340 is about 350.5524337122.

The spelling of 43078340 in words is "forty-three million, seventy-eight thousand, three hundred forty".