13378436 has 12 divisors (see below), whose sum is σ = 23548812. Its totient is φ = 6650208.

The previous prime is 13378429. The next prime is 13378487. The reversal of 13378436 is 63487331.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12390400 + 988036 = 3520^2 + 994^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13378396 and 13378405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8975 + ... + 10358.

It is an arithmetic number, because the mean of its divisors is an integer number (1962401).

Almost surely, 2^13378436 is an apocalyptic number.

It is an amenable number.

13378436 is a deficient number, since it is larger than the sum of its proper divisors (10170376).

13378436 is a wasteful number, since it uses less digits than its factorization.

13378436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19510 (or 19508 counting only the distinct ones).

The product of its digits is 36288, while the sum is 35.

The square root of 13378436 is about 3657.6544396649. The cubic root of 13378436 is about 237.3932950026.

The spelling of 13378436 in words is "thirteen million, three hundred seventy-eight thousand, four hundred thirty-six".