6340520 has 32 divisors (see below), whose sum is σ = 14341320. Its totient is φ = 2522880.

The previous prime is 6340519. The next prime is 6340567. The reversal of 6340520 is 250436.

It can be written as a sum of positive squares in 4 ways, for example, as 5982916 + 357604 = 2446^2 + 598^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 6340492 and 6340501.

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, 11450 + ... + 11990.

Almost surely, 2^6340520 is an apocalyptic number.

It is an amenable number.

6340520 is an abundant number, since it is smaller than the sum of its proper divisors (8000800).

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

6340520 is a wasteful number, since it uses less digits than its factorization.

6340520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845 (or 841 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 6340520 is about 2518.0389194768. The cubic root of 6340520 is about 185.0865920415.

Adding to 6340520 its reverse (250436), we get a palindrome (6590956).

The spelling of 6340520 in words is "six million, three hundred forty thousand, five hundred twenty".