6406878 has 16 divisors (see below), whose sum is σ = 12894336. Its totient is φ = 2122200.

The previous prime is 6406877. The next prime is 6406879. The reversal of 6406878 is 8786046.

6406878 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (6406877) and next prime (6406879).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6406877) 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, 2298 + ... + 4253.

It is an arithmetic number, because the mean of its divisors is an integer number (805896).

Almost surely, 2^6406878 is an apocalyptic number.

6406878 is an abundant number, since it is smaller than the sum of its proper divisors (6487458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6406878 is a wasteful number, since it uses less digits than its factorization.

6406878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6719.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 6406878 is about 2531.1811472117. The cubic root of 6406878 is about 185.7300396329.

It can be divided in two parts, 64068 and 78, that added together give a palindrome (64146).

The spelling of 6406878 in words is "six million, four hundred six thousand, eight hundred seventy-eight".