43749330 has 64 divisors (see below), whose sum is σ = 112337280. Its totient is φ = 10865664.

The previous prime is 43749323. The next prime is 43749359. The reversal of 43749330 is 3394734.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 43749291 and 43749300.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55197 + ... + 55983.

It is an arithmetic number, because the mean of its divisors is an integer number (1755270).

Almost surely, 2^43749330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43749330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56168640).

43749330 is an abundant number, since it is smaller than the sum of its proper divisors (68587950).

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

43749330 is a wasteful number, since it uses less digits than its factorization.

43749330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923.

The product of its (nonzero) digits is 27216, while the sum is 33.

The square root of 43749330 is about 6614.3276302282. The cubic root of 43749330 is about 352.3631378550.

The spelling of 43749330 in words is "forty-three million, seven hundred forty-nine thousand, three hundred thirty".