6470540440 has 128 divisors (see below), whose sum is σ = 18861696000. Its totient is φ = 1940018688.

The previous prime is 6470540429. The next prime is 6470540467. The reversal of 6470540440 is 440450746.

It is a junction number, because it is equal to n+sod(n) for n = 6470540396 and 6470540405.

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, 22381 + ... + 115939.

It is an arithmetic number, because the mean of its divisors is an integer number (147357000).

Almost surely, 2^6470540440 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 6470540440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9430848000).

6470540440 is an abundant number, since it is smaller than the sum of its proper divisors (12391155560).

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

6470540440 is a wasteful number, since it uses less digits than its factorization.

6470540440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93609 (or 93605 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 34.

The square root of 6470540440 is about 80439.6695667007. The cubic root of 6470540440 is about 1863.4318687983.

The spelling of 6470540440 in words is "six billion, four hundred seventy million, five hundred forty thousand, four hundred forty".