16438338 has 48 divisors (see below), whose sum is σ = 40936896. Its totient is φ = 4669920.

The previous prime is 16438333. The next prime is 16438349. The reversal of 16438338 is 83383461.

It is a happy number.

16438338 is a `hidden beast` number, since 1 + 643 + 8 + 3 + 3 + 8 = 666.

16438338 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (16438333) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35428 + ... + 35888.

It is an arithmetic number, because the mean of its divisors is an integer number (852852).

Almost surely, 2^16438338 is an apocalyptic number.

16438338 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16438338, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20468448).

16438338 is an abundant number, since it is smaller than the sum of its proper divisors (24498558).

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

16438338 is a wasteful number, since it uses less digits than its factorization.

16438338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759 (or 756 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 16438338 is about 4054.4220303269. The cubic root of 16438338 is about 254.2646403743.

The spelling of 16438338 in words is "sixteen million, four hundred thirty-eight thousand, three hundred thirty-eight".