4143638 has 4 divisors (see below), whose sum is σ = 6215460. Its totient is φ = 2071818.

The previous prime is 4143637. The next prime is 4143641. The reversal of 4143638 is 8363414.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 4143638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4143637) 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, 1035908 + ... + 1035911.

It is an arithmetic number, because the mean of its divisors is an integer number (1553865).

Almost surely, 2^4143638 is an apocalyptic number.

4143638 is a deficient number, since it is larger than the sum of its proper divisors (2071822).

4143638 is a wasteful number, since it uses less digits than its factorization.

4143638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2071821.

The product of its digits is 6912, while the sum is 29.

The square root of 4143638 is about 2035.5927883543. The cubic root of 4143638 is about 160.6178971560.

The spelling of 4143638 in words is "four million, one hundred forty-three thousand, six hundred thirty-eight".