16774138 has 12 divisors (see below), whose sum is σ = 26729262. Its totient is φ = 7893440.

The previous prime is 16774099. The next prime is 16774139. The reversal of 16774138 is 83147761.

It can be written as a sum of positive squares in 3 ways, for example, as 15896169 + 877969 = 3987^2 + 937^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16774097 and 16774106.

It is not an unprimeable number, because it can be changed into a prime (16774139) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13933 + ... + 15088.

Almost surely, 2^16774138 is an apocalyptic number.

16774138 is a deficient number, since it is larger than the sum of its proper divisors (9955124).

16774138 is a wasteful number, since it uses less digits than its factorization.

16774138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29057 (or 29040 counting only the distinct ones).

The product of its digits is 28224, while the sum is 37.

The square root of 16774138 is about 4095.6242503433. The cubic root of 16774138 is about 255.9843435249.

It can be divided in two parts, 167 and 74138, that added together give a triangular number (74305 = T₃₈₅).

The spelling of 16774138 in words is "sixteen million, seven hundred seventy-four thousand, one hundred thirty-eight".