6293442640 has 20 divisors (see below), whose sum is σ = 14632254324. Its totient is φ = 2517377024.

The previous prime is 6293442607. The next prime is 6293442667. The reversal of 6293442640 is 462443926.

It can be written as a sum of positive squares in 2 ways, for example, as 4515302416 + 1778140224 = 67196^2 + 42168^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 6293442593 and 6293442602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39333937 + ... + 39334096.

Almost surely, 2^6293442640 is an apocalyptic number.

It is an amenable number.

6293442640 is an abundant number, since it is smaller than the sum of its proper divisors (8338811684).

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

6293442640 is a wasteful number, since it uses less digits than its factorization.

6293442640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78668046 (or 78668040 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 40.

The square root of 6293442640 is about 79331.2210923291. The cubic root of 6293442640 is about 1846.2737404365.

The spelling of 6293442640 in words is "six billion, two hundred ninety-three million, four hundred forty-two thousand, six hundred forty".