16604040 has 64 divisors (see below), whose sum is σ = 50155200. Its totient is φ = 4397312.

The previous prime is 16604033. The next prime is 16604051. The reversal of 16604040 is 4040661.

It is a junction number, because it is equal to n+sod(n) for n = 16603998 and 16604016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21094 + ... + 21866.

It is an arithmetic number, because the mean of its divisors is an integer number (783675).

Almost surely, 2^16604040 is an apocalyptic number.

16604040 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 16604040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25077600).

16604040 is an abundant number, since it is smaller than the sum of its proper divisors (33551160).

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

16604040 is a wasteful number, since it uses less digits than its factorization.

16604040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966 (or 962 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 16604040 is about 4074.8055168314. The cubic root of 16604040 is about 255.1161331844.

The spelling of 16604040 in words is "sixteen million, six hundred four thousand, forty".