6439802 has 4 divisors (see below), whose sum is σ = 9659706. Its totient is φ = 3219900.

The previous prime is 6439777. The next prime is 6439819. The reversal of 6439802 is 2089346.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4532641 + 1907161 = 2129^2 + 1381^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1609949 + ... + 1609952.

Almost surely, 2^6439802 is an apocalyptic number.

6439802 is a deficient number, since it is larger than the sum of its proper divisors (3219904).

6439802 is a wasteful number, since it uses less digits than its factorization.

6439802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3219903.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 6439802 is about 2537.6764963249. The cubic root of 6439802 is about 186.0476426305.

The spelling of 6439802 in words is "six million, four hundred thirty-nine thousand, eight hundred two".