6439772 has 12 divisors (see below), whose sum is σ = 11438280. Its totient is φ = 3171696.

The previous prime is 6439759. The next prime is 6439777. The reversal of 6439772 is 2779346.

It is a d-powerful number, because it can be written as 6⁴ + 4⁷ + 3¹² + 9 + 7⁶ + 7⁸ + 2¹³ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6439777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11747 + ... + 12282.

It is an arithmetic number, because the mean of its divisors is an integer number (953190).

Almost surely, 2^6439772 is an apocalyptic number.

It is an amenable number.

6439772 is a deficient number, since it is larger than the sum of its proper divisors (4998508).

6439772 is a wasteful number, since it uses less digits than its factorization.

6439772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24100 (or 24098 counting only the distinct ones).

The product of its digits is 63504, while the sum is 38.

The square root of 6439772 is about 2537.6705853991. The cubic root of 6439772 is about 186.0473537273.

The spelling of 6439772 in words is "six million, four hundred thirty-nine thousand, seven hundred seventy-two".