16988474 has 8 divisors (see below), whose sum is σ = 26981748. Its totient is φ = 7994560.

The previous prime is 16988399. The next prime is 16988501. The reversal of 16988474 is 47488961.

It can be written as a sum of positive squares in 2 ways, for example, as 13213225 + 3775249 = 3635^2 + 1943^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249797 + ... + 249864.

Almost surely, 2^16988474 is an apocalyptic number.

16988474 is a deficient number, since it is larger than the sum of its proper divisors (9993274).

16988474 is a wasteful number, since it uses less digits than its factorization.

16988474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499680.

The product of its digits is 387072, while the sum is 47.

The square root of 16988474 is about 4121.7076558145. The cubic root of 16988474 is about 257.0700349638.

The spelling of 16988474 in words is "sixteen million, nine hundred eighty-eight thousand, four hundred seventy-four".