43389972 has 72 divisors (see below), whose sum is σ = 115785600. Its totient is φ = 14051520.

The previous prime is 43389961. The next prime is 43389989. The reversal of 43389972 is 27998334.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 181429 + ... + 181667.

Almost surely, 2^43389972 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 43389972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57892800).

43389972 is an abundant number, since it is smaller than the sum of its proper divisors (72395628).

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

43389972 is a wasteful number, since it uses less digits than its factorization.

43389972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 285 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 43389972 is about 6587.1064967860. The cubic root of 43389972 is about 351.3957112132.

The spelling of 43389972 in words is "forty-three million, three hundred eighty-nine thousand, nine hundred seventy-two".