12778464 has 24 divisors (see below), whose sum is σ = 33543720. Its totient is φ = 4259456.

The previous prime is 12778453. The next prime is 12778471. The reversal of 12778464 is 46487721.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 66459 + ... + 66650.

It is an arithmetic number, because the mean of its divisors is an integer number (1397655).

Almost surely, 2^12778464 is an apocalyptic number.

It is an amenable number.

12778464 is an abundant number, since it is smaller than the sum of its proper divisors (20765256).

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

12778464 is a wasteful number, since it uses less digits than its factorization.

12778464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133122 (or 133114 counting only the distinct ones).

The product of its digits is 75264, while the sum is 39.

The square root of 12778464 is about 3574.6977494608. The cubic root of 12778464 is about 233.7901544827.

The spelling of 12778464 in words is "twelve million, seven hundred seventy-eight thousand, four hundred sixty-four".