16404030 has 96 divisors (see below), whose sum is σ = 45995040. Its totient is φ = 4043520.

The previous prime is 16404007. The next prime is 16404041. The reversal of 16404030 is 3040461.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 16403994 and 16404012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 90540 + ... + 90720.

It is an arithmetic number, because the mean of its divisors is an integer number (479115).

Almost surely, 2^16404030 is an apocalyptic number.

16404030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16404030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22997520).

16404030 is an abundant number, since it is smaller than the sum of its proper divisors (29591010).

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

16404030 is a wasteful number, since it uses less digits than its factorization.

16404030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 263 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 16404030 is about 4050.1888844843. The cubic root of 16404030 is about 254.0876276078.

Adding to 16404030 its reverse (3040461), we get a palindrome (19444491).

The spelling of 16404030 in words is "sixteen million, four hundred four thousand, thirty".