6394428 has 18 divisors (see below), whose sum is σ = 16163784. Its totient is φ = 2131464.

The previous prime is 6394373. The next prime is 6394433. The reversal of 6394428 is 8244936.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 177623 = 6394428 / (6 + 3 + 9 + 4 + 4 + 2 + 8).

It is a d-powerful number, because it can be written as 6³ + 3¹³ + 9⁷ + 4² + 4⁷ + 2⁹ + 8 .

It is a junction number, because it is equal to n+sod(n) for n = 6394392 and 6394401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 88776 + ... + 88847.

It is an arithmetic number, because the mean of its divisors is an integer number (897988).

Almost surely, 2^6394428 is an apocalyptic number.

It is an amenable number.

6394428 is an abundant number, since it is smaller than the sum of its proper divisors (9769356).

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

6394428 is a wasteful number, since it uses less digits than its factorization.

6394428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177633 (or 177628 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 6394428 is about 2528.7206251383. The cubic root of 6394428 is about 185.6096565898.

The spelling of 6394428 in words is "six million, three hundred ninety-four thousand, four hundred twenty-eight".