12388770 has 24 divisors (see below), whose sum is σ = 32211036. Its totient is φ = 3303648.

The previous prime is 12388763. The next prime is 12388787. The reversal of 12388770 is 7788321.

It can be written as a sum of positive squares in 2 ways, for example, as 12257001 + 131769 = 3501^2 + 363^2 .

It is a super-2 number, since 2×12388770² = 306963244225800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68737 + ... + 68916.

Almost surely, 2^12388770 is an apocalyptic number.

12388770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12388770 is an abundant number, since it is smaller than the sum of its proper divisors (19822266).

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

12388770 is a wasteful number, since it uses less digits than its factorization.

12388770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137666 (or 137663 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 12388770 is about 3519.7684582938. The cubic root of 12388770 is about 231.3890111359.

The spelling of 12388770 in words is "twelve million, three hundred eighty-eight thousand, seven hundred seventy".