16404028 has 12 divisors (see below), whose sum is σ = 28751632. Its totient is φ = 8189280.

The previous prime is 16404007. The next prime is 16404041. The reversal of 16404028 is 82040461.

It is a junction number, because it is equal to n+sod(n) for n = 16403993 and 16404011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88 + ... + 5728.

Almost surely, 2^16404028 is an apocalyptic number.

It is an amenable number.

16404028 is a deficient number, since it is larger than the sum of its proper divisors (12347604).

16404028 is a wasteful number, since it uses less digits than its factorization.

16404028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6372 (or 6370 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 16404028 is about 4050.1886375822. The cubic root of 16404028 is about 254.0876172816.

Adding to 16404028 its reverse (82040461), we get a palindrome (98444489).

The spelling of 16404028 in words is "sixteen million, four hundred four thousand, twenty-eight".