6279840 has 216 divisors, whose sum is σ = 25208820. Its totient is φ = 1419264.

The previous prime is 6279839. The next prime is 6279841. The reversal of 6279840 is 489726.

6279840 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (6279839) and next prime (6279841).

It can be written as a sum of positive squares in 2 ways, for example, as 5934096 + 345744 = 2436^2 + 588^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 6279795 and 6279804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6279841) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 70516 + ... + 70604.

Almost surely, 2^6279840 is an apocalyptic number.

6279840 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 6279840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12604410).

6279840 is an abundant number, since it is smaller than the sum of its proper divisors (18928980).

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

6279840 is a wasteful number, since it uses less digits than its factorization.

6279840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 6279840 is about 2505.9608935496. The cubic root of 6279840 is about 184.4942602925.

The spelling of 6279840 in words is "six million, two hundred seventy-nine thousand, eight hundred forty".