16545440 has 24 divisors (see below), whose sum is σ = 39088980. Its totient is φ = 6618112.

The previous prime is 16545421. The next prime is 16545443. The reversal of 16545440 is 4454561.

It can be written as a sum of positive squares in 2 ways, for example, as 16418704 + 126736 = 4052^2 + 356^2 .

It is not an unprimeable number, because it can be changed into a prime (16545443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51545 + ... + 51864.

Almost surely, 2^16545440 is an apocalyptic number.

16545440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16545440 is an abundant number, since it is smaller than the sum of its proper divisors (22543540).

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

16545440 is a wasteful number, since it uses less digits than its factorization.

16545440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103424 (or 103416 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 16545440 is about 4067.6086340748. The cubic root of 16545440 is about 254.8156555651.

The spelling of 16545440 in words is "sixteen million, five hundred forty-five thousand, four hundred forty".