12730770 has 144 divisors (see below), whose sum is σ = 38368512. Its totient is φ = 3032640.

The previous prime is 12730733. The next prime is 12730777. The reversal of 12730770 is 7703721.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12730777) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 410655 + ... + 410685.

It is an arithmetic number, because the mean of its divisors is an integer number (266448).

Almost surely, 2^12730770 is an apocalyptic number.

12730770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12730770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19184256).

12730770 is an abundant number, since it is smaller than the sum of its proper divisors (25637742).

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

12730770 is a wasteful number, since it uses less digits than its factorization.

12730770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 2058, while the sum is 27.

The square root of 12730770 is about 3568.0204595826. The cubic root of 12730770 is about 233.4989278028.

The spelling of 12730770 in words is "twelve million, seven hundred thirty thousand, seven hundred seventy".