13278738 has 16 divisors (see below), whose sum is σ = 28971936. Its totient is φ = 4023840.

The previous prime is 13278737. The next prime is 13278791. The reversal of 13278738 is 83787231.

It is a junction number, because it is equal to n+sod(n) for n = 13278696 and 13278705.

It is not an unprimeable number, because it can be changed into a prime (13278737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100531 + ... + 100662.

It is an arithmetic number, because the mean of its divisors is an integer number (1810746).

Almost surely, 2^13278738 is an apocalyptic number.

13278738 is an abundant number, since it is smaller than the sum of its proper divisors (15693198).

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

13278738 is a wasteful number, since it uses less digits than its factorization.

13278738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201209.

The product of its digits is 56448, while the sum is 39.

The square root of 13278738 is about 3644.0002744237. Note that the first 3 decimals coincide. The cubic root of 13278738 is about 236.8021279217.

The spelling of 13278738 in words is "thirteen million, two hundred seventy-eight thousand, seven hundred thirty-eight".