12776538 has 8 divisors (see below), whose sum is σ = 25553088. Its totient is φ = 4258844.

The previous prime is 12776513. The next prime is 12776539. The reversal of 12776538 is 83567721.

12776538 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

12776538 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 12776496 and 12776505.

It is not an unprimeable number, because it can be changed into a prime (12776539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1064706 + ... + 1064717.

It is an arithmetic number, because the mean of its divisors is an integer number (3194136).

Almost surely, 2^12776538 is an apocalyptic number.

12776538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12776538 is a wasteful number, since it uses less digits than its factorization.

12776538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129428.

The product of its digits is 70560, while the sum is 39.

The square root of 12776538 is about 3574.4283459037. The cubic root of 12776538 is about 233.7784080928.

The spelling of 12776538 in words is "twelve million, seven hundred seventy-six thousand, five hundred thirty-eight".