16138668 has 48 divisors (see below), whose sum is σ = 46350080. Its totient is φ = 4256064.

The previous prime is 16138667. The next prime is 16138669. The reversal of 16138668 is 86683161.

16138668 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 an interprime number because it is at equal distance from previous prime (16138667) and next prime (16138669).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (16138667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6298 + ... + 8481.

Almost surely, 2^16138668 is an apocalyptic number.

It is an amenable number.

16138668 is an abundant number, since it is smaller than the sum of its proper divisors (30211412).

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

16138668 is a wasteful number, since it uses less digits than its factorization.

16138668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14806 (or 14804 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 16138668 is about 4017.2961055914. The cubic root of 16138668 is about 252.7100784108.

The spelling of 16138668 in words is "sixteen million, one hundred thirty-eight thousand, six hundred sixty-eight".