12434402440 has 32 divisors (see below), whose sum is σ = 28360664280. Its totient is φ = 4905626112.

The previous prime is 12434402417. The next prime is 12434402479. The reversal of 12434402440 is 4420443421.

It can be written as a sum of positive squares in 4 ways, for example, as 8064399204 + 4370003236 = 89802^2 + 66106^2 .

It is a super-2 number, since 2×12434402440² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12434402399 and 12434402408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2126259 + ... + 2132098.

Almost surely, 2^12434402440 is an apocalyptic number.

12434402440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12434402440 is an abundant number, since it is smaller than the sum of its proper divisors (15926261840).

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

12434402440 is a wasteful number, since it uses less digits than its factorization.

12434402440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4258441 (or 4258437 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 12434402440 its reverse (4420443421), we get a palindrome (16854845861).

The spelling of 12434402440 in words is "twelve billion, four hundred thirty-four million, four hundred two thousand, four hundred forty".