13278736 has 15 divisors (see below), whose sum is σ = 25755823. Its totient is φ = 6632080.

The previous prime is 13278721. The next prime is 13278737. The reversal of 13278736 is 63787231.

The square root of 13278736 is 3644.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13278695 and 13278704.

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

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 14121 + ... + 15031.

Almost surely, 2^13278736 is an apocalyptic number.

13278736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

13278736 is the 3644-th square number.

It is an amenable number.

13278736 is a deficient number, since it is larger than the sum of its proper divisors (12477087).

13278736 is an frugal number, since it uses more digits than its factorization.

13278736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830 (or 913 counting only the distinct ones).

The product of its digits is 42336, while the sum is 37.

The cubic root of 13278736 is about 236.8021160330.

The spelling of 13278736 in words is "thirteen million, two hundred seventy-eight thousand, seven hundred thirty-six".