13271428 has 6 divisors (see below), whose sum is σ = 23225006. Its totient is φ = 6635712.

The previous prime is 13271393. The next prime is 13271429. The reversal of 13271428 is 82417231.

It can be written as a sum of positive squares in only one way, i.e., 7739524 + 5531904 = 2782^2 + 2352^2 .

It is a super-2 number, since 2×13271428² = 352261602318368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13271396 and 13271405.

It is not an unprimeable number, because it can be changed into a prime (13271429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1658925 + ... + 1658932.

Almost surely, 2^13271428 is an apocalyptic number.

It is an amenable number.

13271428 is a deficient number, since it is larger than the sum of its proper divisors (9953578).

13271428 is a wasteful number, since it uses less digits than its factorization.

13271428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3317861 (or 3317859 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 13271428 is about 3642.9971177589. The cubic root of 13271428 is about 236.7586664297.

Adding to 13271428 its reverse (82417231), we get a palindrome (95688659).

It can be divided in two parts, 13 and 271428, that added together give a square (271441 = 521²).

The spelling of 13271428 in words is "thirteen million, two hundred seventy-one thousand, four hundred twenty-eight".