16777138 has 48 divisors (see below), whose sum is σ = 31458240. Its totient is φ = 6562080.

The previous prime is 16777127. The next prime is 16777139. The reversal of 16777138 is 83177761.

Its product of digits (49392) is a multiple of the sum of its prime divisors (112).

It is a nialpdrome in base 8 and base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 16777138.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16777139) 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, 390145 + ... + 390187.

It is an arithmetic number, because the mean of its divisors is an integer number (655380).

Almost surely, 2^16777138 is an apocalyptic number.

16777138 is a deficient number, since it is larger than the sum of its proper divisors (14681102).

16777138 is a wasteful number, since it uses less digits than its factorization.

16777138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 112 counting only the distinct ones).

The product of its digits is 49392, while the sum is 40.

The square root of 16777138 is about 4095.9904785046. The cubic root of 16777138 is about 255.9996032709. Note that the first 3 decimals are identical.

The spelling of 16777138 in words is "sixteen million, seven hundred seventy-seven thousand, one hundred thirty-eight".