4129638 has 16 divisors (see below), whose sum is σ = 8282736. Its totient is φ = 1372640.

The previous prime is 4129637. The next prime is 4129649. The reversal of 4129638 is 8369214.

It is a super-2 number, since 2×4129638² = 34107820022088, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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

It is a junction number, because it is equal to n+sod(n) for n = 4129599 and 4129608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4129633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2020 + ... + 3512.

It is an arithmetic number, because the mean of its divisors is an integer number (517671).

Almost surely, 2^4129638 is an apocalyptic number.

4129638 is an abundant number, since it is smaller than the sum of its proper divisors (4153098).

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

4129638 is a wasteful number, since it uses less digits than its factorization.

4129638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1959.

The product of its digits is 10368, while the sum is 33.

The square root of 4129638 is about 2032.1510770610. The cubic root of 4129638 is about 160.4368012358.

The spelling of 4129638 in words is "four million, one hundred twenty-nine thousand, six hundred thirty-eight".