13782920 has 32 divisors (see below), whose sum is σ = 32837400. Its totient is φ = 5188608.

The previous prime is 13782913. The next prime is 13782943. The reversal of 13782920 is 2928731.

It can be written as a sum of positive squares in 4 ways, for example, as 13380964 + 401956 = 3658^2 + 634^2 .

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, 9455 + ... + 10814.

Almost surely, 2^13782920 is an apocalyptic number.

13782920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13782920 is an abundant number, since it is smaller than the sum of its proper divisors (19054480).

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

13782920 is a wasteful number, since it uses less digits than its factorization.

13782920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20297 (or 20293 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 13782920 is about 3712.5355217156. The cubic root of 13782920 is about 239.7620326446.

The spelling of 13782920 in words is "thirteen million, seven hundred eighty-two thousand, nine hundred twenty".