13434440 has 32 divisors (see below), whose sum is σ = 30802680. Its totient is φ = 5271552.

The previous prime is 13434427. The next prime is 13434451. The reversal of 13434440 is 4443431.

It can be written as a sum of positive squares in 4 ways, for example, as 11142244 + 2292196 = 3338^2 + 1514^2 .

It is a super-2 number, since 2×13434440² = 360968356227200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1049 + ... + 5288.

Almost surely, 2^13434440 is an apocalyptic number.

13434440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13434440 is an abundant number, since it is smaller than the sum of its proper divisors (17368240).

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

13434440 is a wasteful number, since it uses less digits than its factorization.

13434440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6401 (or 6397 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 13434440 is about 3665.3021703538. The cubic root of 13434440 is about 237.7240876697.

Adding to 13434440 its reverse (4443431), we get a palindrome (17877871).

The spelling of 13434440 in words is "thirteen million, four hundred thirty-four thousand, four hundred forty".