6477138 has 64 divisors (see below), whose sum is σ = 15552000. Its totient is φ = 1991952.

The previous prime is 6477137. The next prime is 6477143. The reversal of 6477138 is 8317746.

6477138 is a `hidden beast` number, since 647 + 7 + 1 + 3 + 8 = 666.

Its product of digits (28224) is a multiple of the sum of its prime factors (196).

It is not an unprimeable number, because it can be changed into a prime (6477137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60481 + ... + 60587.

It is an arithmetic number, because the mean of its divisors is an integer number (243000).

Almost surely, 2^6477138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6477138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7776000).

6477138 is an abundant number, since it is smaller than the sum of its proper divisors (9074862).

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

6477138 is a wasteful number, since it uses less digits than its factorization.

6477138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 190 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 6477138 is about 2545.0222002961. The cubic root of 6477138 is about 186.4064990949.

The spelling of 6477138 in words is "six million, four hundred seventy-seven thousand, one hundred thirty-eight".