13381730 has 16 divisors (see below), whose sum is σ = 24129144. Its totient is φ = 5343360.

The previous prime is 13381727. The next prime is 13381747. The reversal of 13381730 is 3718331.

It can be written as a sum of positive squares in 4 ways, for example, as 9369721 + 4012009 = 3061^2 + 2003^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13381730.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9470 + ... + 10790.

Almost surely, 2^13381730 is an apocalyptic number.

13381730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13381730 is a deficient number, since it is larger than the sum of its proper divisors (10747414).

13381730 is a wasteful number, since it uses less digits than its factorization.

13381730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2341.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 13381730 is about 3658.1047005246. The cubic root of 13381730 is about 237.4127768350.

The spelling of 13381730 in words is "thirteen million, three hundred eighty-one thousand, seven hundred thirty".