13440423400 has 48 divisors (see below), whose sum is σ = 31525577100. Its totient is φ = 5328583680.

The previous prime is 13440423391. The next prime is 13440423401. The reversal of 13440423400 is 432404431.

It can be written as a sum of positive squares in 6 ways, for example, as 941630596 + 12498792804 = 30686^2 + 111798^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (13440423401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 274755 + ... + 319954.

Almost surely, 2^13440423400 is an apocalyptic number.

13440423400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13440423400 is an abundant number, since it is smaller than the sum of its proper divisors (18085153700).

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

13440423400 is a wasteful number, since it uses less digits than its factorization.

13440423400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594838 (or 594829 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 13440423400 its reverse (432404431), we get a palindrome (13872827831).

The spelling of 13440423400 in words is "thirteen billion, four hundred forty million, four hundred twenty-three thousand, four hundred".