16220404 has 12 divisors (see below), whose sum is σ = 28418404. Its totient is φ = 8100864.

The previous prime is 16220401. The next prime is 16220411. The reversal of 16220404 is 40402261.

It can be written as a sum of positive squares in 2 ways, for example, as 14424804 + 1795600 = 3798^2 + 1340^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16220401) 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, 2854 + ... + 6370.

Almost surely, 2^16220404 is an apocalyptic number.

It is an amenable number.

16220404 is a deficient number, since it is larger than the sum of its proper divisors (12198000).

16220404 is a wasteful number, since it uses less digits than its factorization.

16220404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4674 (or 4672 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 16220404 is about 4027.4562691605. The cubic root of 16220404 is about 253.1359858871.

Adding to 16220404 its reverse (40402261), we get a palindrome (56622665).

The spelling of 16220404 in words is "sixteen million, two hundred twenty thousand, four hundred four".