13661028 has 24 divisors (see below), whose sum is σ = 35417760. Its totient is φ = 4553640.

The previous prime is 13661017. The next prime is 13661033. The reversal of 13661028 is 82016631.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 13660992 and 13661010.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 63138 + ... + 63353.

It is an arithmetic number, because the mean of its divisors is an integer number (1475740).

Almost surely, 2^13661028 is an apocalyptic number.

13661028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13661028 is an abundant number, since it is smaller than the sum of its proper divisors (21756732).

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

13661028 is a wasteful number, since it uses less digits than its factorization.

13661028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126504 (or 126496 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 13661028 is about 3696.0827912805. The cubic root of 13661028 is about 239.0531443474.

Adding to 13661028 its reverse (82016631), we get a palindrome (95677659).

The spelling of 13661028 in words is "thirteen million, six hundred sixty-one thousand, twenty-eight".