43890912 has 144 divisors (see below), whose sum is σ = 141719760. Its totient is φ = 12773376.

The previous prime is 43890911. The next prime is 43890929. The reversal of 43890912 is 21909834.

43890912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43890911) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 70828 + ... + 71444.

It is an arithmetic number, because the mean of its divisors is an integer number (984165).

Almost surely, 2^43890912 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 43890912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70859880).

43890912 is an abundant number, since it is smaller than the sum of its proper divisors (97828848).

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

43890912 is a wasteful number, since it uses less digits than its factorization.

43890912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665 (or 654 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 43890912 is about 6625.0216603419. The cubic root of 43890912 is about 352.7428355404.

The spelling of 43890912 in words is "forty-three million, eight hundred ninety thousand, nine hundred twelve".