6470640 has 240 divisors, whose sum is σ = 25534080. Its totient is φ = 1451520.

The previous prime is 6470627. The next prime is 6470641. The reversal of 6470640 is 460746.

6470640 = 55² + 56² + ... + 269².

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6470641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 150459 + ... + 150501.

It is an arithmetic number, because the mean of its divisors is an integer number (106392).

Almost surely, 2^6470640 is an apocalyptic number.

6470640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6470640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12767040).

6470640 is an abundant number, since it is smaller than the sum of its proper divisors (19063440).

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

6470640 is a wasteful number, since it uses less digits than its factorization.

6470640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 6470640 is about 2543.7452702659. The cubic root of 6470640 is about 186.3441426080.

It can be divided in two parts, 64706 and 40, that added together give a palindrome (64746).

The spelling of 6470640 in words is "six million, four hundred seventy thousand, six hundred forty".