6518140 has 48 divisors (see below), whose sum is σ = 15271200. Its totient is φ = 2322432.

The previous prime is 6518137. The next prime is 6518147. The reversal of 6518140 is 418156.

It is a super-2 number, since 2×6518140² = 84972298119200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6518147) 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, 5956 + ... + 6964.

It is an arithmetic number, because the mean of its divisors is an integer number (318150).

Almost surely, 2^6518140 is an apocalyptic number.

6518140 is the 1615-th heptagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6518140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7635600).

6518140 is an abundant number, since it is smaller than the sum of its proper divisors (8753060).

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

6518140 is a wasteful number, since it uses less digits than its factorization.

6518140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054 (or 1052 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 6518140 is about 2553.0648248723. The cubic root of 6518140 is about 186.7990062108.

It can be divided in two parts, 651 and 8140, that multiplied together give a triangular number (5299140 = T₃₂₅₅).

The spelling of 6518140 in words is "six million, five hundred eighteen thousand, one hundred forty".