6434540 has 96 divisors (see below), whose sum is σ = 16934400. Its totient is φ = 2004480.

The previous prime is 6434537. The next prime is 6434567. The reversal of 6434540 is 454346.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109031 + ... + 109089.

It is an arithmetic number, because the mean of its divisors is an integer number (176400).

Almost surely, 2^6434540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6434540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8467200).

6434540 is an abundant number, since it is smaller than the sum of its proper divisors (10499860).

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

6434540 is a wasteful number, since it uses less digits than its factorization.

6434540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 6434540 is about 2536.6395092721. The cubic root of 6434540 is about 185.9969552822.

Adding to 6434540 its reverse (454346), we get a palindrome (6888886).

The spelling of 6434540 in words is "six million, four hundred thirty-four thousand, five hundred forty".