6417840 has 240 divisors, whose sum is σ = 24935904. Its totient is φ = 1351680.

The previous prime is 6417779. The next prime is 6417841. The reversal of 6417840 is 487146.

6417840 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 6417798 and 6417807.

It is not an unprimeable number, because it can be changed into a prime (6417841) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 377512 + ... + 377528.

Almost surely, 2^6417840 is an apocalyptic number.

6417840 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 6417840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12467952).

6417840 is an abundant number, since it is smaller than the sum of its proper divisors (18518064).

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

6417840 is a wasteful number, since it uses less digits than its factorization.

6417840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 6417840 is about 2533.3456140053. The cubic root of 6417840 is about 185.8359056845.

The spelling of 6417840 in words is "six million, four hundred seventeen thousand, eight hundred forty".