16623560 has 32 divisors (see below), whose sum is σ = 37922040. Its totient is φ = 6557184.

The previous prime is 16623559. The next prime is 16623577. The reversal of 16623560 is 6532661.

It can be written as a sum of positive squares in 4 ways, for example, as 10640644 + 5982916 = 3262^2 + 2446^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74 + ... + 5766.

Almost surely, 2^16623560 is an apocalyptic number.

16623560 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 16623560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18961020).

16623560 is an abundant number, since it is smaller than the sum of its proper divisors (21298480).

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

16623560 is a wasteful number, since it uses less digits than its factorization.

16623560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5777 (or 5773 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 16623560 is about 4077.2000196213. The cubic root of 16623560 is about 255.2160670302.

The spelling of 16623560 in words is "sixteen million, six hundred twenty-three thousand, five hundred sixty".