6438157 has 8 divisors (see below), whose sum is σ = 7061472. Its totient is φ = 5821200.

The previous prime is 6438151. The next prime is 6438161. The reversal of 6438157 is 7518346.

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

It is a de Polignac number, because none of the positive numbers 2^k-6438157 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6438151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 682 + ... + 3652.

It is an arithmetic number, because the mean of its divisors is an integer number (882684).

Almost surely, 2^6438157 is an apocalyptic number.

It is an amenable number.

6438157 is a deficient number, since it is larger than the sum of its proper divisors (623315).

6438157 is a wasteful number, since it uses less digits than its factorization.

6438157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3179.

The product of its digits is 20160, while the sum is 34.

The square root of 6438157 is about 2537.3523602369. The cubic root of 6438157 is about 186.0317997813.

The spelling of 6438157 in words is "six million, four hundred thirty-eight thousand, one hundred fifty-seven".