6445635 has 64 divisors (see below), whose sum is σ = 13105152. Its totient is φ = 2635776.

The previous prime is 6445619. The next prime is 6445639. The reversal of 6445635 is 5365446.

It is not a de Polignac number, because 6445635 - 2⁴ = 6445619 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 6⁸ + 4² + 4¹⁰ + 5⁷ + 6⁸ + 3⁸ + 5⁹ .

It is a junction number, because it is equal to n+sod(n) for n = 6445596 and 6445605.

It is not an unprimeable number, because it can be changed into a prime (6445639) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 40977 + ... + 41133.

It is an arithmetic number, because the mean of its divisors is an integer number (204768).

Almost surely, 2^6445635 is an apocalyptic number.

6445635 is an abundant number, since it is smaller than the sum of its proper divisors (6659517).

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

6445635 is a wasteful number, since it uses less digits than its factorization.

6445635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212.

The product of its digits is 43200, while the sum is 33.

The square root of 6445635 is about 2538.8255158636. The cubic root of 6445635 is about 186.1037980015.

The spelling of 6445635 in words is "six million, four hundred forty-five thousand, six hundred thirty-five".