6398712 has 48 divisors (see below), whose sum is σ = 17461080. Its totient is φ = 2116800.

The previous prime is 6398671. The next prime is 6398723. The reversal of 6398712 is 2178936.

6398712 is a `hidden beast` number, since 639 + 8 + 7 + 12 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 12787 + ... + 13277.

Almost surely, 2^6398712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6398712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8730540).

6398712 is an abundant number, since it is smaller than the sum of its proper divisors (11062368).

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

6398712 is a wasteful number, since it uses less digits than its factorization.

6398712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684 (or 677 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 6398712 is about 2529.5675519741. The cubic root of 6398712 is about 185.6510975789.

The spelling of 6398712 in words is "six million, three hundred ninety-eight thousand, seven hundred twelve".