12156438 has 16 divisors (see below), whose sum is σ = 27786240. Its totient is φ = 3473256.

The previous prime is 12156383. The next prime is 12156439. The reversal of 12156438 is 83465121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12156439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144678 + ... + 144761.

It is an arithmetic number, because the mean of its divisors is an integer number (1736640).

Almost surely, 2^12156438 is an apocalyptic number.

12156438 is an abundant number, since it is smaller than the sum of its proper divisors (15629802).

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

12156438 is a wasteful number, since it uses less digits than its factorization.

12156438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289451.

The product of its digits is 5760, while the sum is 30.

The square root of 12156438 is about 3486.6083806473. The cubic root of 12156438 is about 229.9334274876.

The spelling of 12156438 in words is "twelve million, one hundred fifty-six thousand, four hundred thirty-eight".