16040404 has 6 divisors (see below), whose sum is σ = 28070714. Its totient is φ = 8020200.

The previous prime is 16040399. The next prime is 16040411. The reversal of 16040404 is 40404061.

16040404 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., 9548100 + 6492304 = 3090^2 + 2548^2 .

16040404 is a modest number, since divided by 40404 gives 16 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2005047 + ... + 2005054.

Almost surely, 2^16040404 is an apocalyptic number.

It is an amenable number.

16040404 is a deficient number, since it is larger than the sum of its proper divisors (12030310).

16040404 is a wasteful number, since it uses less digits than its factorization.

16040404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4010105 (or 4010103 counting only the distinct ones).

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

The square root of 16040404 is about 4005.0473155757. The cubic root of 16040404 is about 252.1961393961.

Adding to 16040404 its reverse (40404061), we get a palindrome (56444465).

The spelling of 16040404 in words is "sixteen million, forty thousand, four hundred four".