6418740 has 24 divisors (see below), whose sum is σ = 17972640. Its totient is φ = 1711648.

The previous prime is 6418733. The next prime is 6418747. The reversal of 6418740 is 478146.

It is an interprime number because it is at equal distance from previous prime (6418733) and next prime (6418747).

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6418698 and 6418707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6418747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53430 + ... + 53549.

It is an arithmetic number, because the mean of its divisors is an integer number (748860).

Almost surely, 2^6418740 is an apocalyptic number.

6418740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6418740 is an abundant number, since it is smaller than the sum of its proper divisors (11553900).

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

6418740 is a wasteful number, since it uses less digits than its factorization.

6418740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106991 (or 106989 counting only the distinct ones).

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

The square root of 6418740 is about 2533.5232384961. The cubic root of 6418740 is about 185.8445921220.

The spelling of 6418740 in words is "six million, four hundred eighteen thousand, seven hundred forty".