16135638 has 16 divisors (see below), whose sum is σ = 32880816. Its totient is φ = 5276960.

The previous prime is 16135633. The next prime is 16135643. The reversal of 16135638 is 83653161.

It is an interprime number because it is at equal distance from previous prime (16135633) and next prime (16135643).

It is a junction number, because it is equal to n+sod(n) for n = 16135599 and 16135608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16135631) 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, 25053 + ... + 25688.

It is an arithmetic number, because the mean of its divisors is an integer number (2055051).

Almost surely, 2^16135638 is an apocalyptic number.

16135638 is an abundant number, since it is smaller than the sum of its proper divisors (16745178).

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

16135638 is a wasteful number, since it uses less digits than its factorization.

16135638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50799.

The product of its digits is 12960, while the sum is 33.

The square root of 16135638 is about 4016.9189685628. The cubic root of 16135638 is about 252.6942621641.

Adding to 16135638 its reverse (83653161), we get a palindrome (99788799).

The spelling of 16135638 in words is "sixteen million, one hundred thirty-five thousand, six hundred thirty-eight".