16438857 has 24 divisors (see below), whose sum is σ = 23737824. Its totient is φ = 10112256.

The previous prime is 16438837. The next prime is 16438907. The reversal of 16438857 is 75883461.

It is not a de Polignac number, because 16438857 - 2⁷ = 16438729 is a prime.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (16438817) 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, 46393 + ... + 46745.

It is an arithmetic number, because the mean of its divisors is an integer number (989076).

Almost surely, 2^16438857 is an apocalyptic number.

It is an amenable number.

16438857 is a deficient number, since it is larger than the sum of its proper divisors (7298967).

16438857 is a wasteful number, since it uses less digits than its factorization.

16438857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437 (or 418 counting only the distinct ones).

The product of its digits is 161280, while the sum is 42.

The square root of 16438857 is about 4054.4860340122. The cubic root of 16438857 is about 254.2673162725.

The spelling of 16438857 in words is "sixteen million, four hundred thirty-eight thousand, eight hundred fifty-seven".