12697388 has 12 divisors (see below), whose sum is σ = 24240552. Its totient is φ = 5771520.

The previous prime is 12697367. The next prime is 12697393. The reversal of 12697388 is 88379621.

It is a super-2 number, since 2×12697388² = 322447324045088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 288577 = 12697388 / (1 + 2 + 6 + 9 + 7 + 3 + 8 + 8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144245 + ... + 144332.

It is an arithmetic number, because the mean of its divisors is an integer number (2020046).

Almost surely, 2^12697388 is an apocalyptic number.

It is an amenable number.

12697388 is a deficient number, since it is larger than the sum of its proper divisors (11543164).

12697388 is a wasteful number, since it uses less digits than its factorization.

12697388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288592 (or 288590 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 12697388 is about 3563.3394449589. The cubic root of 12697388 is about 233.2946593499.

The spelling of 12697388 in words is "twelve million, six hundred ninety-seven thousand, three hundred eighty-eight".