6465540 has 48 divisors (see below), whose sum is σ = 18228672. Its totient is φ = 1712256.

The previous prime is 6465539. The next prime is 6465551. The reversal of 6465540 is 455646.

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 = 6465498 and 6465507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11547 + ... + 12093.

It is an arithmetic number, because the mean of its divisors is an integer number (379764).

Almost surely, 2^6465540 is an apocalyptic number.

6465540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6465540 is an abundant number, since it is smaller than the sum of its proper divisors (11763132).

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

6465540 is a wasteful number, since it uses less digits than its factorization.

6465540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756 (or 754 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 6465540 is about 2542.7426137932. The cubic root of 6465540 is about 186.2951724433.

The spelling of 6465540 in words is "six million, four hundred sixty-five thousand, five hundred forty".