16987338 has 12 divisors (see below), whose sum is σ = 36805938. Its totient is φ = 5662440.

The previous prime is 16987337. The next prime is 16987343. The reversal of 16987338 is 83378961.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9018009 + 7969329 = 3003^2 + 2823^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16987293 and 16987302.

It is not an unprimeable number, because it can be changed into a prime (16987337) 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, 471853 + ... + 471888.

Almost surely, 2^16987338 is an apocalyptic number.

16987338 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16987338 is an abundant number, since it is smaller than the sum of its proper divisors (19818600).

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

16987338 is a wasteful number, since it uses less digits than its factorization.

16987338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943749 (or 943746 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 16987338 is about 4121.5698465512. The cubic root of 16987338 is about 257.0643048422.

The spelling of 16987338 in words is "sixteen million, nine hundred eighty-seven thousand, three hundred thirty-eight".