6339840 has 144 divisors (see below), whose sum is σ = 21977088. Its totient is φ = 1548288.

The previous prime is 6339811. The next prime is 6339847. The reversal of 6339840 is 489336.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6339847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49857 + ... + 49983.

Almost surely, 2^6339840 is an apocalyptic number.

6339840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6339840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10988544).

6339840 is an abundant number, since it is smaller than the sum of its proper divisors (15637248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6339840 is a wasteful number, since it uses less digits than its factorization.

6339840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 6339840 is about 2517.9038901435. The cubic root of 6339840 is about 185.0799751614.

It can be divided in two parts, 63 and 39840, that multiplied together give a triangular number (2509920 = T₂₂₄₀).

The spelling of 6339840 in words is "six million, three hundred thirty-nine thousand, eight hundred forty".