6450638 has 4 divisors (see below), whose sum is σ = 9675960. Its totient is φ = 3225318.

The previous prime is 6450637. The next prime is 6450641. The reversal of 6450638 is 8360546.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×6450638² = 83221461214088, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6450637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1612658 + ... + 1612661.

It is an arithmetic number, because the mean of its divisors is an integer number (2418990).

Almost surely, 2^6450638 is an apocalyptic number.

6450638 is a deficient number, since it is larger than the sum of its proper divisors (3225322).

6450638 is a wasteful number, since it uses less digits than its factorization.

6450638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225321.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 6450638 is about 2539.8106228615. The cubic root of 6450638 is about 186.1519358244.

The spelling of 6450638 in words is "six million, four hundred fifty thousand, six hundred thirty-eight".