16404480 has 156 divisors (see below), whose sum is σ = 57500820. Its totient is φ = 4325376.

The previous prime is 16404461. The next prime is 16404503. The reversal of 16404480 is 8440461.

It can be written as a sum of positive squares in 2 ways, for example, as 4460544 + 11943936 = 2112^2 + 3456^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 4 and base 16.

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, 184276 + ... + 184364.

It is an arithmetic number, because the mean of its divisors is an integer number (368595).

Almost surely, 2^16404480 is an apocalyptic number.

16404480 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 16404480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28750410).

16404480 is an abundant number, since it is smaller than the sum of its proper divisors (41096340).

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

16404480 is an equidigital number, since it uses as much as digits as its factorization.

16404480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 16404480 is about 4050.2444370680. The cubic root of 16404480 is about 254.0899509878.

It can be divided in two parts, 16 and 404480, that added together give a square (404496 = 636²).

The spelling of 16404480 in words is "sixteen million, four hundred four thousand, four hundred eighty".