12787868 has 12 divisors (see below), whose sum is σ = 22405992. Its totient is φ = 6386160.

The previous prime is 12787867. The next prime is 12787877. The reversal of 12787868 is 86878721.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12787867) 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, 3371 + ... + 6077.

It is an arithmetic number, because the mean of its divisors is an integer number (1867166).

Almost surely, 2^12787868 is an apocalyptic number.

It is an amenable number.

12787868 is a deficient number, since it is larger than the sum of its proper divisors (9618124).

12787868 is a wasteful number, since it uses less digits than its factorization.

12787868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3892 (or 3890 counting only the distinct ones).

The product of its digits is 301056, while the sum is 47.

The square root of 12787868 is about 3576.0128635115. The cubic root of 12787868 is about 233.8474911472.

It can be divided in two parts, 12787 and 868, that multiplied together give a triangular number (11099116 = T₄₇₁₁).

The spelling of 12787868 in words is "twelve million, seven hundred eighty-seven thousand, eight hundred sixty-eight".