16404453 has 24 divisors (see below), whose sum is σ = 25716600. Its totient is φ = 10016640.

The previous prime is 16404449. The next prime is 16404461. The reversal of 16404453 is 35440461.

It can be written as a sum of positive squares in 4 ways, for example, as 26244 + 16378209 = 162^2 + 4047^2 .

It is not a de Polignac number, because 16404453 - 2² = 16404449 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16404413) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16963 + ... + 17903.

It is an arithmetic number, because the mean of its divisors is an integer number (1071525).

Almost surely, 2^16404453 is an apocalyptic number.

16404453 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16404453 is a deficient number, since it is larger than the sum of its proper divisors (9312147).

16404453 is a wasteful number, since it uses less digits than its factorization.

16404453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109 (or 1106 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 16404453 is about 4050.2411039344. The cubic root of 16404453 is about 254.0898115862.

The spelling of 16404453 in words is "sixteen million, four hundred four thousand, four hundred fifty-three".