12388402 has 8 divisors (see below), whose sum is σ = 20012076. Its totient is φ = 5717712.

The previous prime is 12388391. The next prime is 12388403. The reversal of 12388402 is 20488321.

It can be written as a sum of positive squares in 2 ways, for example, as 12383361 + 5041 = 3519^2 + 71^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12388402² = 306945008227208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12388403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238213 + ... + 238264.

Almost surely, 2^12388402 is an apocalyptic number.

12388402 is a deficient number, since it is larger than the sum of its proper divisors (7623674).

12388402 is a wasteful number, since it uses less digits than its factorization.

12388402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476492.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 12388402 is about 3519.7161817397. The cubic root of 12388402 is about 231.3867200288.

The spelling of 12388402 in words is "twelve million, three hundred eighty-eight thousand, four hundred two".