13571028 has 36 divisors (see below), whose sum is σ = 34419840. Its totient is φ = 4508496.

The previous prime is 13571027. The next prime is 13571039. The reversal of 13571028 is 82017531.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 13570992 and 13571010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13571023) 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 11 ways as a sum of consecutive naturals, for example, 16851 + ... + 17637.

Almost surely, 2^13571028 is an apocalyptic number.

13571028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13571028 is an abundant number, since it is smaller than the sum of its proper divisors (20848812).

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

13571028 is a wasteful number, since it uses less digits than its factorization.

13571028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276 (or 1271 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 13571028 is about 3683.8876204358. The cubic root of 13571028 is about 238.5270198677.

Adding to 13571028 its reverse (82017531), we get a palindrome (95588559).

The spelling of 13571028 in words is "thirteen million, five hundred seventy-one thousand, twenty-eight".