6359440 has 20 divisors (see below), whose sum is σ = 14785884. Its totient is φ = 2543744.

The previous prime is 6359407. The next prime is 6359453. The reversal of 6359440 is 449536.

It can be written as a sum of positive squares in 2 ways, for example, as 4145296 + 2214144 = 2036^2 + 1488^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×6359440² = 80884954227200, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 39667 + ... + 39826.

Almost surely, 2^6359440 is an apocalyptic number.

It is an amenable number.

6359440 is an abundant number, since it is smaller than the sum of its proper divisors (8426444).

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

6359440 is a wasteful number, since it uses less digits than its factorization.

6359440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79506 (or 79500 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 6359440 is about 2521.7930129176. The cubic root of 6359440 is about 185.2705076059.

The spelling of 6359440 in words is "six million, three hundred fifty-nine thousand, four hundred forty".