13277440 has 144 divisors (see below), whose sum is σ = 37086336. Its totient is φ = 4505600.

The previous prime is 13277437. The next prime is 13277471. The reversal of 13277440 is 4477231.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 13277399 and 13277408.

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, 323820 + ... + 323860.

It is an arithmetic number, because the mean of its divisors is an integer number (257544).

Almost surely, 2^13277440 is an apocalyptic number.

13277440 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 13277440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18543168).

13277440 is an abundant number, since it is smaller than the sum of its proper divisors (23808896).

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

13277440 is a wasteful number, since it uses less digits than its factorization.

13277440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 13277440 is about 3643.8221690966. The cubic root of 13277440 is about 236.7944118477.

The spelling of 13277440 in words is "thirteen million, two hundred seventy-seven thousand, four hundred forty".