6428438 has 8 divisors (see below), whose sum is σ = 9653688. Its totient is φ = 3210544.

The previous prime is 6428419. The next prime is 6428447. The reversal of 6428438 is 8348246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 6428398 and 6428407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1745 + ... + 3987.

It is an arithmetic number, because the mean of its divisors is an integer number (1206711).

Almost surely, 2^6428438 is an apocalyptic number.

6428438 is a deficient number, since it is larger than the sum of its proper divisors (3225250).

6428438 is a wasteful number, since it uses less digits than its factorization.

6428438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3678.

The product of its digits is 36864, while the sum is 35.

The square root of 6428438 is about 2535.4364515799. The cubic root of 6428438 is about 185.9381418380.

The spelling of 6428438 in words is "six million, four hundred twenty-eight thousand, four hundred thirty-eight".