6455638 has 16 divisors (see below), whose sum is σ = 11303424. Its totient is φ = 2707560.

The previous prime is 6455623. The next prime is 6455639. The reversal of 6455638 is 8365546.

It is a junction number, because it is equal to n+sod(n) for n = 6455597 and 6455606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6455639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4248 + ... + 5563.

It is an arithmetic number, because the mean of its divisors is an integer number (706464).

Almost surely, 2^6455638 is an apocalyptic number.

6455638 is a deficient number, since it is larger than the sum of its proper divisors (4847786).

6455638 is a wasteful number, since it uses less digits than its factorization.

6455638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9867.

The product of its digits is 86400, while the sum is 37.

The square root of 6455638 is about 2540.7947575513. The cubic root of 6455638 is about 186.2000199209.

The spelling of 6455638 in words is "six million, four hundred fifty-five thousand, six hundred thirty-eight".