6428642 has 16 divisors (see below), whose sum is σ = 10625472. Its totient is φ = 2892720.

The previous prime is 6428627. The next prime is 6428647. The reversal of 6428642 is 2468246.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6428599 and 6428608.

It is not an unprimeable number, because it can be changed into a prime (6428647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 848 + ... + 3684.

It is an arithmetic number, because the mean of its divisors is an integer number (664092).

Almost surely, 2^6428642 is an apocalyptic number.

6428642 is a deficient number, since it is larger than the sum of its proper divisors (4196830).

6428642 is a wasteful number, since it uses less digits than its factorization.

6428642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2953.

The product of its digits is 18432, while the sum is 32.

The square root of 6428642 is about 2535.4766810208. The cubic root of 6428642 is about 185.9401086704.

The spelling of 6428642 in words is "six million, four hundred twenty-eight thousand, six hundred forty-two".