6138878 has 4 divisors (see below), whose sum is σ = 9208320. Its totient is φ = 3069438.

The previous prime is 6138877. The next prime is 6138883. The reversal of 6138878 is 8788316.

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 (6138871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1534718 + ... + 1534721.

It is an arithmetic number, because the mean of its divisors is an integer number (2302080).

Almost surely, 2^6138878 is an apocalyptic number.

6138878 is a deficient number, since it is larger than the sum of its proper divisors (3069442).

6138878 is a wasteful number, since it uses less digits than its factorization.

6138878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3069441.

The product of its digits is 64512, while the sum is 41.

The square root of 6138878 is about 2477.6759271543. The cubic root of 6138878 is about 183.1033685966.

The spelling of 6138878 in words is "six million, one hundred thirty-eight thousand, eight hundred seventy-eight".