16580840 has 16 divisors (see below), whose sum is σ = 37306980. Its totient is φ = 6632320.

The previous prime is 16580833. The next prime is 16580881. The reversal of 16580840 is 4808561.

It can be written as a sum of positive squares in 2 ways, for example, as 16434916 + 145924 = 4054^2 + 382^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16580797 and 16580806.

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, 207221 + ... + 207300.

Almost surely, 2^16580840 is an apocalyptic number.

16580840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16580840 is an abundant number, since it is smaller than the sum of its proper divisors (20726140).

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

16580840 is a wasteful number, since it uses less digits than its factorization.

16580840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414532 (or 414528 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 16580840 is about 4071.9577600953. The cubic root of 16580840 is about 254.9972574356.

The spelling of 16580840 in words is "sixteen million, five hundred eighty thousand, eight hundred forty".