16404730 has 16 divisors (see below), whose sum is σ = 30013704. Its totient is φ = 6454080.

The previous prime is 16404709. The next prime is 16404757. The reversal of 16404730 is 3740461.

It can be written as a sum of positive squares in 4 ways, for example, as 12866569 + 3538161 = 3587^2 + 1881^2 .

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 16404695 and 16404704.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12837 + ... + 14056.

Almost surely, 2^16404730 is an apocalyptic number.

16404730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16404730 is a deficient number, since it is larger than the sum of its proper divisors (13608974).

16404730 is a wasteful number, since it uses less digits than its factorization.

16404730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26961.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 16404730 is about 4050.2752992852. The cubic root of 16404730 is about 254.0912417362.

The spelling of 16404730 in words is "sixteen million, four hundred four thousand, seven hundred thirty".