16404880 has 40 divisors (see below), whose sum is σ = 38961792. Its totient is φ = 6420864.

The previous prime is 16404863. The next prime is 16404937. The reversal of 16404880 is 8840461.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1579 + ... + 5941.

Almost surely, 2^16404880 is an apocalyptic number.

16404880 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 16404880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19480896).

16404880 is an abundant number, since it is smaller than the sum of its proper divisors (22556912).

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

16404880 is a wasteful number, since it uses less digits than its factorization.

16404880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4423 (or 4417 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 16404880 is about 4050.2938165027. The cubic root of 16404880 is about 254.0920161789.

The spelling of 16404880 in words is "sixteen million, four hundred four thousand, eight hundred eighty".