16498640 has 20 divisors (see below), whose sum is σ = 38359524. Its totient is φ = 6599424.

The previous prime is 16498639. The next prime is 16498661. The reversal of 16498640 is 4689461.

It can be written as a sum of positive squares in 2 ways, for example, as 12222016 + 4276624 = 3496^2 + 2068^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 16498594 and 16498603.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103037 + ... + 103196.

Almost surely, 2^16498640 is an apocalyptic number.

16498640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16498640 is an abundant number, since it is smaller than the sum of its proper divisors (21860884).

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

16498640 is a wasteful number, since it uses less digits than its factorization.

16498640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206246 (or 206240 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 16498640 is about 4061.8517944406. The cubic root of 16498640 is about 254.5751737100.

The spelling of 16498640 in words is "sixteen million, four hundred ninety-eight thousand, six hundred forty".