16404530 has 16 divisors (see below), whose sum is σ = 29592000. Its totient is φ = 6547632.

The previous prime is 16404529. The next prime is 16404559. The reversal of 16404530 is 3540461.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 16404496 and 16404505.

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, 3971 + ... + 6969.

It is an arithmetic number, because the mean of its divisors is an integer number (1849500).

Almost surely, 2^16404530 is an apocalyptic number.

16404530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16404530 is a deficient number, since it is larger than the sum of its proper divisors (13187470).

16404530 is a wasteful number, since it uses less digits than its factorization.

16404530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 16404530 is about 4050.2506095302. The cubic root of 16404530 is about 254.0902091385.

Adding to 16404530 its reverse (3540461), we get a palindrome (19944991).

The spelling of 16404530 in words is "sixteen million, four hundred four thousand, five hundred thirty".