6439432 has 8 divisors (see below), whose sum is σ = 12073950. Its totient is φ = 3219712.

The previous prime is 6439427. The next prime is 6439439. The reversal of 6439432 is 2349346.

It can be written as a sum of positive squares in only one way, i.e., 6022116 + 417316 = 2454^2 + 646^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 6439394 and 6439403.

It is not an unprimeable number, because it can be changed into a prime (6439439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402457 + ... + 402472.

Almost surely, 2^6439432 is an apocalyptic number.

It is an amenable number.

6439432 is a deficient number, since it is larger than the sum of its proper divisors (5634518).

6439432 is a wasteful number, since it uses less digits than its factorization.

6439432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804935 (or 804931 counting only the distinct ones).

The product of its digits is 15552, while the sum is 31.

The square root of 6439432 is about 2537.6035939445. The cubic root of 6439432 is about 186.0440794285.

The spelling of 6439432 in words is "six million, four hundred thirty-nine thousand, four hundred thirty-two".