16404560 has 60 divisors (see below), whose sum is σ = 39406332. Its totient is φ = 6349824.

The previous prime is 16404559. The next prime is 16404571. The reversal of 16404560 is 6540461.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 595984 + 15808576 = 772^2 + 3976^2 .

It is a zygodrome in base 4.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 224684 + ... + 224756.

Almost surely, 2^16404560 is an apocalyptic number.

16404560 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 16404560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19703166).

16404560 is an abundant number, since it is smaller than the sum of its proper divisors (23001772).

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

16404560 is an equidigital number, since it uses as much as digits as its factorization.

16404560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 16404560 is about 4050.2543130031. The cubic root of 16404560 is about 254.0903640287.

The spelling of 16404560 in words is "sixteen million, four hundred four thousand, five hundred sixty".