16626138 has 8 divisors (see below), whose sum is σ = 33252288. Its totient is φ = 5542044.

The previous prime is 16626107. The next prime is 16626149. The reversal of 16626138 is 83162661.

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

16626138 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 16626099 and 16626108.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1385506 + ... + 1385517.

It is an arithmetic number, because the mean of its divisors is an integer number (4156536).

Almost surely, 2^16626138 is an apocalyptic number.

16626138 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.

16626138 is a wasteful number, since it uses less digits than its factorization.

16626138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771028.

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

The square root of 16626138 is about 4077.5161557007. The cubic root of 16626138 is about 255.2292594112.

Adding to 16626138 its reverse (83162661), we get a palindrome (99788799).

The spelling of 16626138 in words is "sixteen million, six hundred twenty-six thousand, one hundred thirty-eight".