12867780 has 24 divisors (see below), whose sum is σ = 36029952. Its totient is φ = 3431392.

The previous prime is 12867779. The next prime is 12867781. The reversal of 12867780 is 8776821.

It is an interprime number because it is at equal distance from previous prime (12867779) and next prime (12867781).

It is not an unprimeable number, because it can be changed into a prime (12867781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107172 + ... + 107291.

It is an arithmetic number, because the mean of its divisors is an integer number (1501248).

Almost surely, 2^12867780 is an apocalyptic number.

12867780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12867780 is an abundant number, since it is smaller than the sum of its proper divisors (23162172).

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

12867780 is a wasteful number, since it uses less digits than its factorization.

12867780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214475 (or 214473 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 12867780 is about 3587.1688000427. The cubic root of 12867780 is about 234.3335880611. Note that the first 3 decimals are identical.

The spelling of 12867780 in words is "twelve million, eight hundred sixty-seven thousand, seven hundred eighty".