13403142440 has 64 divisors (see below), whose sum is σ = 30998538000. Its totient is φ = 5213458432.

The previous prime is 13403142439. The next prime is 13403142463. The reversal of 13403142440 is 4424130431.

It can be written as a sum of positive squares in 8 ways, for example, as 1781008804 + 11622133636 = 42202^2 + 107806^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211586 + ... + 267534.

Almost surely, 2^13403142440 is an apocalyptic number.

13403142440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13403142440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15499269000).

13403142440 is an abundant number, since it is smaller than the sum of its proper divisors (17595395560).

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

13403142440 is a wasteful number, since it uses less digits than its factorization.

13403142440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56126 (or 56122 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 13403142440 its reverse (4424130431), we get a palindrome (17827272871).

The spelling of 13403142440 in words is "thirteen billion, four hundred three million, one hundred forty-two thousand, four hundred forty".