6413778 has 48 divisors (see below), whose sum is σ = 16061760. Its totient is φ = 1811808.

The previous prime is 6413741. The next prime is 6413779. The reversal of 6413778 is 8773146.

6413778 is a `hidden beast` number, since 641 + 3 + 7 + 7 + 8 = 666.

It is a super-2 number, since 2×6413778² = 82273096466568, which contains 22 as substring.

Its product of digits (28224) is a multiple of the sum of its prime divisors (588).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6413779) 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 in 23 ways as a sum of consecutive naturals, for example, 13501 + ... + 13967.

It is an arithmetic number, because the mean of its divisors is an integer number (334620).

Almost surely, 2^6413778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6413778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8030880).

6413778 is an abundant number, since it is smaller than the sum of its proper divisors (9647982).

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

6413778 is a wasteful number, since it uses less digits than its factorization.

6413778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591 (or 588 counting only the distinct ones).

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

The square root of 6413778 is about 2532.5437804705. The cubic root of 6413778 is about 185.7966907897.

The spelling of 6413778 in words is "six million, four hundred thirteen thousand, seven hundred seventy-eight".