12440355 has 32 divisors (see below), whose sum is σ = 21026304. Its totient is φ = 6268416.

The previous prime is 12440339. The next prime is 12440357. The reversal of 12440355 is 55304421.

It is not a de Polignac number, because 12440355 - 2⁴ = 12440339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12440357) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36747 + ... + 37083.

It is an arithmetic number, because the mean of its divisors is an integer number (657072).

Almost surely, 2^12440355 is an apocalyptic number.

12440355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12440355 is a deficient number, since it is larger than the sum of its proper divisors (8585949).

12440355 is a wasteful number, since it uses less digits than its factorization.

12440355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 12440355 is about 3527.0887428586. The cubic root of 12440355 is about 231.7097229176.

Adding to 12440355 its reverse (55304421), we get a palindrome (67744776).

The spelling of 12440355 in words is "twelve million, four hundred forty thousand, three hundred fifty-five".