43431028 has 6 divisors (see below), whose sum is σ = 76004306. Its totient is φ = 21715512.

The previous prime is 43431023. The next prime is 43431029. The reversal of 43431028 is 82013434.

43431028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 42745444 + 685584 = 6538^2 + 828^2 .

It is a junction number, because it is equal to n+sod(n) for n = 43430993 and 43431011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43431023) 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 as a sum of consecutive naturals, namely, 5428875 + ... + 5428882.

Almost surely, 2^43431028 is an apocalyptic number.

It is an amenable number.

43431028 is a deficient number, since it is larger than the sum of its proper divisors (32573278).

43431028 is a wasteful number, since it uses less digits than its factorization.

43431028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10857761 (or 10857759 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 43431028 is about 6590.2221510356. Note that the first 3 decimals coincide. The cubic root of 43431028 is about 351.5065075851.

The spelling of 43431028 in words is "forty-three million, four hundred thirty-one thousand, twenty-eight".