6477638 has 4 divisors (see below), whose sum is σ = 9716460. Its totient is φ = 3238818.

The previous prime is 6477637. The next prime is 6477641. The reversal of 6477638 is 8367746.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6477595 and 6477604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6477637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1619408 + ... + 1619411.

It is an arithmetic number, because the mean of its divisors is an integer number (2429115).

Almost surely, 2^6477638 is an apocalyptic number.

6477638 is a deficient number, since it is larger than the sum of its proper divisors (3238822).

6477638 is a wasteful number, since it uses less digits than its factorization.

6477638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3238821.

The product of its digits is 169344, while the sum is 41.

The square root of 6477638 is about 2545.1204293707. The cubic root of 6477638 is about 186.4112954958.

The spelling of 6477638 in words is "six million, four hundred seventy-seven thousand, six hundred thirty-eight".