13681028 has 6 divisors (see below), whose sum is σ = 23941806. Its totient is φ = 6840512.

The previous prime is 13680949. The next prime is 13681033. The reversal of 13681028 is 82018631.

It can be written as a sum of positive squares in only one way, i.e., 13557124 + 123904 = 3682^2 + 352^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1710125 + ... + 1710132.

It is an arithmetic number, because the mean of its divisors is an integer number (3990301).

Almost surely, 2^13681028 is an apocalyptic number.

It is an amenable number.

13681028 is a deficient number, since it is larger than the sum of its proper divisors (10260778).

13681028 is a wasteful number, since it uses less digits than its factorization.

13681028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3420261 (or 3420259 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 13681028 is about 3698.7873688548. The cubic root of 13681028 is about 239.1697468851.

Adding to 13681028 its reverse (82018631), we get a palindrome (95699659).

The spelling of 13681028 in words is "thirteen million, six hundred eighty-one thousand, twenty-eight".