6378428 has 24 divisors (see below), whose sum is σ = 13020000. Its totient is φ = 2733024.

The previous prime is 6378409. The next prime is 6378487. The reversal of 6378428 is 8248736.

6378428 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

6378428 is strictly pandigital in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 6378391 and 6378400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 953 + ... + 3696.

It is an arithmetic number, because the mean of its divisors is an integer number (542500).

Almost surely, 2^6378428 is an apocalyptic number.

It is an amenable number.

6378428 is an abundant number, since it is smaller than the sum of its proper divisors (6641572).

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

6378428 is a wasteful number, since it uses less digits than its factorization.

6378428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4674 (or 4658 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 6378428 is about 2525.5549885124. The cubic root of 6378428 is about 185.4547177949.

The spelling of 6378428 in words is "six million, three hundred seventy-eight thousand, four hundred twenty-eight".