12777320 has 16 divisors (see below), whose sum is σ = 28749060. Its totient is φ = 5110912.

The previous prime is 12777299. The next prime is 12777341. The reversal of 12777320 is 2377721.

It is an interprime number because it is at equal distance from previous prime (12777299) and next prime (12777341).

It can be written as a sum of positive squares in 2 ways, for example, as 12773476 + 3844 = 3574^2 + 62^2 .

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, 159677 + ... + 159756.

Almost surely, 2^12777320 is an apocalyptic number.

12777320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12777320 is an abundant number, since it is smaller than the sum of its proper divisors (15971740).

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

12777320 is a wasteful number, since it uses less digits than its factorization.

12777320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319444 (or 319440 counting only the distinct ones).

The product of its (nonzero) digits is 4116, while the sum is 29.

The square root of 12777320 is about 3574.5377323509. The cubic root of 12777320 is about 233.7831775378.

The spelling of 12777320 in words is "twelve million, seven hundred seventy-seven thousand, three hundred twenty".