13071428 has 12 divisors (see below), whose sum is σ = 22900332. Its totient is φ = 6528480.

The previous prime is 13071427. The next prime is 13071433. The reversal of 13071428 is 82417031.

It can be written as a sum of positive squares in 2 ways, for example, as 2715904 + 10355524 = 1648^2 + 3218^2 .

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 13071397 and 13071406.

It is not an unprimeable number, because it can be changed into a prime (13071427) 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 3 ways as a sum of consecutive naturals, for example, 6026 + ... + 7902.

It is an arithmetic number, because the mean of its divisors is an integer number (1908361).

Almost surely, 2^13071428 is an apocalyptic number.

It is an amenable number.

13071428 is a deficient number, since it is larger than the sum of its proper divisors (9828904).

13071428 is a wasteful number, since it uses less digits than its factorization.

13071428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3622 (or 3620 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 13071428 is about 3615.4429880721. The cubic root of 13071428 is about 235.5633263855.

Adding to 13071428 its reverse (82417031), we get a palindrome (95488459).

The spelling of 13071428 in words is "thirteen million, seventy-one thousand, four hundred twenty-eight".