16206404 has 6 divisors (see below), whose sum is σ = 28361214. Its totient is φ = 8103200.

The previous prime is 16206401. The next prime is 16206409. The reversal of 16206404 is 40460261.

It is a happy number.

16206404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 10252804 + 5953600 = 3202^2 + 2440^2 .

It is a super-2 number, since 2×16206404² = 525295061222432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16206404.

It is not an unprimeable number, because it can be changed into a prime (16206401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2025797 + ... + 2025804.

It is an arithmetic number, because the mean of its divisors is an integer number (4726869).

Almost surely, 2^16206404 is an apocalyptic number.

It is an amenable number.

16206404 is a deficient number, since it is larger than the sum of its proper divisors (12154810).

16206404 is a wasteful number, since it uses less digits than its factorization.

16206404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4051605 (or 4051603 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 16206404 is about 4025.7178241899. The cubic root of 16206404 is about 253.0631368202.

Adding to 16206404 its reverse (40460261), we get a palindrome (56666665).

The spelling of 16206404 in words is "sixteen million, two hundred six thousand, four hundred four".