13026778 has 8 divisors (see below), whose sum is σ = 19733940. Its totient is φ = 6448800.

The previous prime is 13026749. The next prime is 13026779. The reversal of 13026778 is 87762031.

It can be written as a sum of positive squares in 2 ways, for example, as 11471769 + 1555009 = 3387^2 + 1247^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×13026778² = 339393890122568, which contains 22 as substring.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (13026779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32043 + ... + 32446.

Almost surely, 2^13026778 is an apocalyptic number.

13026778 is a deficient number, since it is larger than the sum of its proper divisors (6707162).

13026778 is a wasteful number, since it uses less digits than its factorization.

13026778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64592.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 13026778 is about 3609.2628056156. The cubic root of 13026778 is about 235.2948043044.

The spelling of 13026778 in words is "thirteen million, twenty-six thousand, seven hundred seventy-eight".