12778831 has 8 divisors (see below), whose sum is σ = 13885200. Its totient is φ = 11690112.

The previous prime is 12778817. The next prime is 12778853. The reversal of 12778831 is 13887721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12778831 - 2⁹ = 12778319 is a prime.

It is a super-2 number, since 2×12778831² = 326597043453122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12778331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2881 + ... + 5818.

It is an arithmetic number, because the mean of its divisors is an integer number (1735650).

Almost surely, 2^12778831 is an apocalyptic number.

12778831 is a deficient number, since it is larger than the sum of its proper divisors (1106369).

12778831 is a wasteful number, since it uses less digits than its factorization.

12778831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8825.

The product of its digits is 18816, while the sum is 37.

The square root of 12778831 is about 3574.7490821035. The cubic root of 12778831 is about 233.7923926277.

The spelling of 12778831 in words is "twelve million, seven hundred seventy-eight thousand, eight hundred thirty-one".