16731998 has 8 divisors (see below), whose sum is σ = 25225992. Its totient is φ = 8323336.

The previous prime is 16731997. The next prime is 16732007. The reversal of 16731998 is 89913761.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16731997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20840 + ... + 21627.

It is an arithmetic number, because the mean of its divisors is an integer number (3153249).

Almost surely, 2^16731998 is an apocalyptic number.

16731998 is a deficient number, since it is larger than the sum of its proper divisors (8493994).

16731998 is a wasteful number, since it uses less digits than its factorization.

16731998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42666.

The product of its digits is 81648, while the sum is 44.

The square root of 16731998 is about 4090.4765003603. The cubic root of 16731998 is about 255.7698024250.

The spelling of 16731998 in words is "sixteen million, seven hundred thirty-one thousand, nine hundred ninety-eight".