6464778 has 16 divisors (see below), whose sum is σ = 12954816. Its totient is φ = 2150720.

The previous prime is 6464753. The next prime is 6464797. The reversal of 6464778 is 8774646.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4675 + ... + 5897.

It is an arithmetic number, because the mean of its divisors is an integer number (809676).

Almost surely, 2^6464778 is an apocalyptic number.

6464778 is an abundant number, since it is smaller than the sum of its proper divisors (6490038).

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

6464778 is a wasteful number, since it uses less digits than its factorization.

6464778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2109.

The product of its digits is 225792, while the sum is 42.

The square root of 6464778 is about 2542.5927711688. The cubic root of 6464778 is about 186.2878535136.

The spelling of 6464778 in words is "six million, four hundred sixty-four thousand, seven hundred seventy-eight".