16409320 has 16 divisors (see below), whose sum is σ = 36921060. Its totient is φ = 6563712.

The previous prime is 16409299. The next prime is 16409329. The reversal of 16409320 is 2390461.

It can be written as a sum of positive squares in 2 ways, for example, as 16370116 + 39204 = 4046^2 + 198^2 .

It is not an unprimeable number, because it can be changed into a prime (16409329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205077 + ... + 205156.

Almost surely, 2^16409320 is an apocalyptic number.

16409320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16409320 is an abundant number, since it is smaller than the sum of its proper divisors (20511740).

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

16409320 is a wasteful number, since it uses less digits than its factorization.

16409320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410244 (or 410240 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 16409320 is about 4050.8418878055. The cubic root of 16409320 is about 254.1149375451.

Adding to 16409320 its reverse (2390461), we get a palindrome (18799781).

The spelling of 16409320 in words is "sixteen million, four hundred nine thousand, three hundred twenty".