16438387 has 8 divisors (see below), whose sum is σ = 18903296. Its totient is φ = 14002632.

The previous prime is 16438381. The next prime is 16438393. The reversal of 16438387 is 78383461.

It is an interprime number because it is at equal distance from previous prime (16438381) and next prime (16438393).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16438387 - 2⁷ = 16438259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16438381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6063 + ... + 8344.

It is an arithmetic number, because the mean of its divisors is an integer number (2362912).

Almost surely, 2^16438387 is an apocalyptic number.

16438387 is a deficient number, since it is larger than the sum of its proper divisors (2464909).

16438387 is a wasteful number, since it uses less digits than its factorization.

16438387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14577.

The product of its digits is 96768, while the sum is 40.

The square root of 16438387 is about 4054.4280731072. The cubic root of 16438387 is about 254.2648930145.

The spelling of 16438387 in words is "sixteen million, four hundred thirty-eight thousand, three hundred eighty-seven".