16438955 has 16 divisors (see below), whose sum is σ = 21700224. Its totient is φ = 11879040.

The previous prime is 16438931. The next prime is 16438967. The reversal of 16438955 is 55983461.

It is not a de Polignac number, because 16438955 - 2²⁰ = 15390379 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 365 + ... + 5745.

It is an arithmetic number, because the mean of its divisors is an integer number (1356264).

Almost surely, 2^16438955 is an apocalyptic number.

16438955 is a deficient number, since it is larger than the sum of its proper divisors (5261269).

16438955 is a wasteful number, since it uses less digits than its factorization.

16438955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5446.

The product of its digits is 129600, while the sum is 41.

The square root of 16438955 is about 4054.4981193731. The cubic root of 16438955 is about 254.2678215418.

The spelling of 16438955 in words is "sixteen million, four hundred thirty-eight thousand, nine hundred fifty-five".