12776320 has 32 divisors (see below), whose sum is σ = 30544920. Its totient is φ = 5110272.

The previous prime is 12776317. The next prime is 12776321. The reversal of 12776320 is 2367721.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12776321) 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, 9342 + ... + 10621.

Almost surely, 2^12776320 is an apocalyptic number.

12776320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12776320 is an abundant number, since it is smaller than the sum of its proper divisors (17768600).

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

12776320 is an equidigital number, since it uses as much as digits as its factorization.

12776320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19982 (or 19970 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 12776320 is about 3574.3978513870. The cubic root of 12776320 is about 233.7770784686. Note that the first 3 decimals are identical.

The spelling of 12776320 in words is "twelve million, seven hundred seventy-six thousand, three hundred twenty".