13281930 has 48 divisors (see below), whose sum is σ = 36568584. Its totient is φ = 3333120.

The previous prime is 13281911. The next prime is 13281941. The reversal of 13281930 is 3918231.

It can be written as a sum of positive squares in 4 ways, for example, as 13024881 + 257049 = 3609^2 + 507^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13281894 and 13281903.

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 23 ways as a sum of consecutive naturals, for example, 2811 + ... + 5870.

Almost surely, 2^13281930 is an apocalyptic number.

13281930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13281930 is an abundant number, since it is smaller than the sum of its proper divisors (23286654).

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

13281930 is a wasteful number, since it uses less digits than its factorization.

13281930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8711 (or 8708 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 13281930 is about 3644.4382283145. The cubic root of 13281930 is about 236.8211009053.

The spelling of 13281930 in words is "thirteen million, two hundred eighty-one thousand, nine hundred thirty".