6478838 has 4 divisors (see below), whose sum is σ = 9718260. Its totient is φ = 3239418.

The previous prime is 6478831. The next prime is 6478841. The reversal of 6478838 is 8388746.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6478831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1619708 + ... + 1619711.

It is an arithmetic number, because the mean of its divisors is an integer number (2429565).

Almost surely, 2^6478838 is an apocalyptic number.

6478838 is a deficient number, since it is larger than the sum of its proper divisors (3239422).

6478838 is a wasteful number, since it uses less digits than its factorization.

6478838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3239421.

The product of its digits is 258048, while the sum is 44.

The square root of 6478838 is about 2545.3561636832. The cubic root of 6478838 is about 186.4228058510.

The spelling of 6478838 in words is "six million, four hundred seventy-eight thousand, eight hundred thirty-eight".