12977740 has 12 divisors (see below), whose sum is σ = 27253296. Its totient is φ = 5191088.

The previous prime is 12977717. The next prime is 12977743. The reversal of 12977740 is 4777921.

It is a self number, because there is not a number n which added to its sum of digits gives 12977740.

It is not an unprimeable number, because it can be changed into a prime (12977743) 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, 324424 + ... + 324463.

It is an arithmetic number, because the mean of its divisors is an integer number (2271108).

Almost surely, 2^12977740 is an apocalyptic number.

12977740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12977740 is an abundant number, since it is smaller than the sum of its proper divisors (14275556).

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

12977740 is a wasteful number, since it uses less digits than its factorization.

12977740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648896 (or 648894 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 37.

The square root of 12977740 is about 3602.4630463060. The cubic root of 12977740 is about 234.9991851488. Note that the first 3 decimals are identical.

The spelling of 12977740 in words is "twelve million, nine hundred seventy-seven thousand, seven hundred forty".