43398638 has 16 divisors (see below), whose sum is σ = 66134016. Its totient is φ = 21356760.

The previous prime is 43398617. The next prime is 43398643. The reversal of 43398638 is 83689334.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38795 + ... + 39897.

It is an arithmetic number, because the mean of its divisors is an integer number (4133376).

Almost surely, 2^43398638 is an apocalyptic number.

43398638 is a deficient number, since it is larger than the sum of its proper divisors (22735378).

43398638 is a wasteful number, since it uses less digits than its factorization.

43398638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399.

The product of its digits is 373248, while the sum is 44.

The square root of 43398638 is about 6587.7642641491. The cubic root of 43398638 is about 351.4191036576.

The spelling of 43398638 in words is "forty-three million, three hundred ninety-eight thousand, six hundred thirty-eight".