16645380 has 48 divisors (see below), whose sum is σ = 49351680. Its totient is φ = 4177408.

The previous prime is 16645367. The next prime is 16645411. The reversal of 16645380 is 8354661.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7140 + ... + 9179.

It is an arithmetic number, because the mean of its divisors is an integer number (1028160).

Almost surely, 2^16645380 is an apocalyptic number.

16645380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16645380 is an abundant number, since it is smaller than the sum of its proper divisors (32706300).

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

16645380 is a wasteful number, since it uses less digits than its factorization.

16645380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16348 (or 16346 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 16645380 is about 4079.8749980851. The cubic root of 16645380 is about 255.3276833111.

The spelling of 16645380 in words is "sixteen million, six hundred forty-five thousand, three hundred eighty".