43989189696 has 147 divisors (see below), whose sum is σ = 131011626343. Its totient is φ = 14647962240.

The previous prime is 43989189659. The next prime is 43989189701. The reversal of 43989189696 is 69698198934.

The square root of 43989189696 is 209736.

It is a perfect power (a square), and thus also a powerful number.

43989189696 is a `hidden beast` number, since 439 + 8 + 9 + 18 + 96 + 96 = 666.

It is a super-2 number, since 2×43989189696² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 45302491 + ... + 45303461.

Almost surely, 2^43989189696 is an apocalyptic number.

43989189696 is the 209736-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43989189696

43989189696 is an abundant number, since it is smaller than the sum of its proper divisors (87022436647).

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

43989189696 is an frugal number, since it uses more digits than its factorization.

43989189696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1972 (or 976 counting only the distinct ones).

The product of its digits is 181398528, while the sum is 72.

Adding to 43989189696 its product of digits (181398528), we get a square (44170588224 = 210168²).

The spelling of 43989189696 in words is "forty-three billion, nine hundred eighty-nine million, one hundred eighty-nine thousand, six hundred ninety-six".