6411840 has 56 divisors (see below), whose sum is σ = 20360640. Its totient is φ = 1709568.

The previous prime is 6411829. The next prime is 6411851. The reversal of 6411840 is 481146.

It is an interprime number because it is at equal distance from previous prime (6411829) and next prime (6411851).

It is a super-2 number, since 2×6411840² = 82223384371200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 6411840.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2380 + ... + 4299.

Almost surely, 2^6411840 is an apocalyptic number.

6411840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6411840 is an abundant number, since it is smaller than the sum of its proper divisors (13948800).

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

6411840 is a wasteful number, since it uses less digits than its factorization.

6411840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6699 (or 6689 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 6411840 is about 2532.1611323137. The cubic root of 6411840 is about 185.7779753378. Note that the first 3 decimals are identical.

Adding to 6411840 its reverse (481146), we get a palindrome (6892986).

The spelling of 6411840 in words is "six million, four hundred eleven thousand, eight hundred forty".