16438401 has 48 divisors (see below), whose sum is σ = 29552640. Its totient is φ = 8592480.

The previous prime is 16438393. The next prime is 16438421. The reversal of 16438401 is 10483461.

16438401 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16438401 - 2³ = 16438393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16438421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36886 + ... + 37328.

It is an arithmetic number, because the mean of its divisors is an integer number (615680).

Almost surely, 2^16438401 is an apocalyptic number.

It is an amenable number.

16438401 is a deficient number, since it is larger than the sum of its proper divisors (13114239).

16438401 is a wasteful number, since it uses less digits than its factorization.

16438401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506 (or 503 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 16438401 is about 4054.4297996142. The cubic root of 16438401 is about 254.2649651973.

The spelling of 16438401 in words is "sixteen million, four hundred thirty-eight thousand, four hundred one".