43729638 has 8 divisors (see below), whose sum is σ = 87459288. Its totient is φ = 14576544.

The previous prime is 43729633. The next prime is 43729639. The reversal of 43729638 is 83692734.

43729638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

43729638 is an admirable number.

It is a super-2 number, since 2×43729638² = 3824562479222088, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 43729638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43729633) 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 in 3 ways as a sum of consecutive naturals, for example, 3644131 + ... + 3644142.

It is an arithmetic number, because the mean of its divisors is an integer number (10932411).

Almost surely, 2^43729638 is an apocalyptic number.

43729638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

43729638 is a wasteful number, since it uses less digits than its factorization.

43729638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7288278.

The product of its digits is 217728, while the sum is 42.

The square root of 43729638 is about 6612.8388760048. The cubic root of 43729638 is about 352.3102625596.

The spelling of 43729638 in words is "forty-three million, seven hundred twenty-nine thousand, six hundred thirty-eight".