13081378 has 16 divisors (see below), whose sum is σ = 20797560. Its totient is φ = 6160000.

The previous prime is 13081351. The next prime is 13081379. The reversal of 13081378 is 87318031.

13081378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 11648569 + 1432809 = 3413^2 + 1197^2 .

It is a super-2 number, since 2×13081378² = 342244900757768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13081379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373 + ... + 5128.

Almost surely, 2^13081378 is an apocalyptic number.

13081378 is a deficient number, since it is larger than the sum of its proper divisors (7716182).

13081378 is a wasteful number, since it uses less digits than its factorization.

13081378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5573.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 13081378 is about 3616.8187679230. The cubic root of 13081378 is about 235.6230816684.

The spelling of 13081378 in words is "thirteen million, eighty-one thousand, three hundred seventy-eight".