6368778 has 48 divisors (see below), whose sum is σ = 15744456. Its totient is φ = 1843200.

The previous prime is 6368767. The next prime is 6368779. The reversal of 6368778 is 8778636.

6368778 is a `hidden beast` number, since 636 + 8 + 7 + 7 + 8 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 6335289 + 33489 = 2517^2 + 183^2 .

It is a super-2 number, since 2×6368778² = 81122666426568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6368779) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3178 + ... + 4778.

Almost surely, 2^6368778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6368778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7872228).

6368778 is an abundant number, since it is smaller than the sum of its proper divisors (9375678).

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

6368778 is a wasteful number, since it uses less digits than its factorization.

6368778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1639 (or 1636 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 6368778 is about 2523.6437941992. The cubic root of 6368778 is about 185.3611450364.

The spelling of 6368778 in words is "six million, three hundred sixty-eight thousand, seven hundred seventy-eight".