13280418 has 12 divisors (see below), whose sum is σ = 28774278. Its totient is φ = 4426800.

The previous prime is 13280413. The next prime is 13280437. The reversal of 13280418 is 81408231.

It can be written as a sum of positive squares in only one way, i.e., 12766329 + 514089 = 3573^2 + 717^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13280391 and 13280400.

It is not an unprimeable number, because it can be changed into a prime (13280413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 368883 + ... + 368918.

Almost surely, 2^13280418 is an apocalyptic number.

13280418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13280418 is an abundant number, since it is smaller than the sum of its proper divisors (15493860).

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

13280418 is a wasteful number, since it uses less digits than its factorization.

13280418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737809 (or 737806 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 13280418 is about 3644.2307830323. The cubic root of 13280418 is about 236.8121140815.

Adding to 13280418 its reverse (81408231), we get a palindrome (94688649).

The spelling of 13280418 in words is "thirteen million, two hundred eighty thousand, four hundred eighteen".