6439952 has 20 divisors (see below), whose sum is σ = 12783036. Its totient is φ = 3141120.

The previous prime is 6439949. The next prime is 6439969. The reversal of 6439952 is 2599346.

It can be written as a sum of positive squares in 2 ways, for example, as 3671056 + 2768896 = 1916^2 + 1664^2 .

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a d-powerful number, because it can be written as 6⁷ + 4⁹ + 3¹⁴ + 9⁵ + 9⁶ + 5³ + 2¹⁹ .

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, 4253 + ... + 5564.

Almost surely, 2^6439952 is an apocalyptic number.

It is an amenable number.

6439952 is a deficient number, since it is larger than the sum of its proper divisors (6343084).

6439952 is a wasteful number, since it uses less digits than its factorization.

6439952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9866 (or 9860 counting only the distinct ones).

The product of its digits is 58320, while the sum is 38.

The square root of 6439952 is about 2537.7060507474. The cubic root of 6439952 is about 186.0490871330.

Subtracting from 6439952 its reverse (2599346), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 6439952 in words is "six million, four hundred thirty-nine thousand, nine hundred fifty-two".