12153438 has 24 divisors (see below), whose sum is σ = 28726776. Its totient is φ = 3682800.

The previous prime is 12153397. The next prime is 12153451. The reversal of 12153438 is 83435121.

It is a happy number.

12153438 is a `hidden beast` number, since 121 + 534 + 3 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30493 + ... + 30888.

It is an arithmetic number, because the mean of its divisors is an integer number (1196949).

Almost surely, 2^12153438 is an apocalyptic number.

12153438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12153438 is an abundant number, since it is smaller than the sum of its proper divisors (16573338).

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

12153438 is a wasteful number, since it uses less digits than its factorization.

12153438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61400 (or 61397 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 12153438 is about 3486.1781365845. The cubic root of 12153438 is about 229.9145113919.

Adding to 12153438 its reverse (83435121), we get a palindrome (95588559).

The spelling of 12153438 in words is "twelve million, one hundred fifty-three thousand, four hundred thirty-eight".