12978770 has 32 divisors (see below), whose sum is σ = 27565056. Its totient is φ = 4305600.

The previous prime is 12978737. The next prime is 12978773. The reversal of 12978770 is 7787921.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12978773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 821 + ... + 5160.

It is an arithmetic number, because the mean of its divisors is an integer number (861408).

Almost surely, 2^12978770 is an apocalyptic number.

12978770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12978770 is an abundant number, since it is smaller than the sum of its proper divisors (14586286).

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

12978770 is a wasteful number, since it uses less digits than its factorization.

12978770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6026.

The product of its (nonzero) digits is 49392, while the sum is 41.

The square root of 12978770 is about 3602.6060012163. The cubic root of 12978770 is about 235.0054020186.

The spelling of 12978770 in words is "twelve million, nine hundred seventy-eight thousand, seven hundred seventy".