16498989 has 24 divisors (see below), whose sum is σ = 25989600. Its totient is φ = 10024992.

The previous prime is 16498969. The next prime is 16498997. The reversal of 16498989 is 98989461.

It is not a de Polignac number, because 16498989 - 2¹² = 16494893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16498939) 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, 8862 + ... + 10560.

It is an arithmetic number, because the mean of its divisors is an integer number (1082900).

Almost surely, 2^16498989 is an apocalyptic number.

It is an amenable number.

16498989 is a deficient number, since it is larger than the sum of its proper divisors (9490611).

16498989 is a wasteful number, since it uses less digits than its factorization.

16498989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801 (or 1798 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 16498989 is about 4061.8947549143. The cubic root of 16498989 is about 254.5769687288.

The spelling of 16498989 in words is "sixteen million, four hundred ninety-eight thousand, nine hundred eighty-nine".