16645460 has 48 divisors (see below), whose sum is σ = 38203536. Its totient is φ = 6054912.

The previous prime is 16645427. The next prime is 16645469. The reversal of 16645460 is 6454661.

It can be written as a sum of positive squares in 8 ways, for example, as 31684 + 16613776 = 178^2 + 4076^2 .

It is a super-2 number, since 2×16645460² = 554142677223200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16645469) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 18542 + ... + 19418.

It is an arithmetic number, because the mean of its divisors is an integer number (795907).

Almost surely, 2^16645460 is an apocalyptic number.

16645460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16645460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19101768).

16645460 is an abundant number, since it is smaller than the sum of its proper divisors (21558076).

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

16645460 is a wasteful number, since it uses less digits than its factorization.

16645460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972 (or 970 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 16645460 is about 4079.8848022953. The cubic root of 16645460 is about 255.3280923571.

The spelling of 16645460 in words is "sixteen million, six hundred forty-five thousand, four hundred sixty".