43128172 has 6 divisors (see below), whose sum is σ = 75474308. Its totient is φ = 21564084.

The previous prime is 43128109. The next prime is 43128179. The reversal of 43128172 is 27182134.

It is a super-3 number, since 3×43128172³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43128172.

It is not an unprimeable number, because it can be changed into a prime (43128179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5391018 + ... + 5391025.

Almost surely, 2^43128172 is an apocalyptic number.

It is an amenable number.

43128172 is a deficient number, since it is larger than the sum of its proper divisors (32346136).

43128172 is a wasteful number, since it uses less digits than its factorization.

43128172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10782047 (or 10782045 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 43128172 is about 6567.2042757935. The cubic root of 43128172 is about 350.6875518667.

The spelling of 43128172 in words is "forty-three million, one hundred twenty-eight thousand, one hundred seventy-two".