16289540 has 12 divisors (see below), whose sum is σ = 34208076. Its totient is φ = 6515808.

The previous prime is 16289531. The next prime is 16289551. The reversal of 16289540 is 4598261.

It can be written as a sum of positive squares in 2 ways, for example, as 5373124 + 10916416 = 2318^2 + 3304^2 .

It is a super-2 number, since 2×16289540² = 530698226823200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16289540.

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, 407219 + ... + 407258.

It is an arithmetic number, because the mean of its divisors is an integer number (2850673).

Almost surely, 2^16289540 is an apocalyptic number.

16289540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16289540 is an abundant number, since it is smaller than the sum of its proper divisors (17918536).

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

16289540 is a wasteful number, since it uses less digits than its factorization.

16289540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814486 (or 814484 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 16289540 is about 4036.0302278353. The cubic root of 16289540 is about 253.4951221072.

The spelling of 16289540 in words is "sixteen million, two hundred eighty-nine thousand, five hundred forty".