43945440 has 384 divisors, whose sum is σ = 182891520. Its totient is φ = 8601600.

The previous prime is 43945439. The next prime is 43945453. The reversal of 43945440 is 4454934.

43945440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1071820 + ... + 1071860.

It is an arithmetic number, because the mean of its divisors is an integer number (476280).

Almost surely, 2^43945440 is an apocalyptic number.

43945440 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 43945440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91445760).

43945440 is an abundant number, since it is smaller than the sum of its proper divisors (138946080).

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

43945440 is a wasteful number, since it uses less digits than its factorization.

43945440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 43945440 is about 6629.1356902691. The cubic root of 43945440 is about 352.8888521125. Note that the first 4 decimals are identical.

The spelling of 43945440 in words is "forty-three million, nine hundred forty-five thousand, four hundred forty".