12877978 has 8 divisors (see below), whose sum is σ = 19435968. Its totient is φ = 6399324.

The previous prime is 12877973. The next prime is 12877979. The reversal of 12877978 is 87977821.

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

It is not an unprimeable number, because it can be changed into a prime (12877973) 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, 19426 + ... + 20077.

It is an arithmetic number, because the mean of its divisors is an integer number (2429496).

Almost surely, 2^12877978 is an apocalyptic number.

12877978 is a deficient number, since it is larger than the sum of its proper divisors (6557990).

12877978 is a wasteful number, since it uses less digits than its factorization.

12877978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39668.

The product of its digits is 395136, while the sum is 49.

The square root of 12877978 is about 3588.5899737919. The cubic root of 12877978 is about 234.3954765636.

The spelling of 12877978 in words is "twelve million, eight hundred seventy-seven thousand, nine hundred seventy-eight".