13780338 has 32 divisors (see below), whose sum is σ = 32380992. Its totient is φ = 3854400.

The previous prime is 13780331. The next prime is 13780369. The reversal of 13780338 is 83308731.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13780299 and 13780308.

It is not an unprimeable number, because it can be changed into a prime (13780331) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7173 + ... + 8888.

It is an arithmetic number, because the mean of its divisors is an integer number (1011906).

Almost surely, 2^13780338 is an apocalyptic number.

13780338 is an abundant number, since it is smaller than the sum of its proper divisors (18600654).

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

13780338 is a wasteful number, since it uses less digits than its factorization.

13780338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16090.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 13780338 is about 3712.1877646477. The cubic root of 13780338 is about 239.7470599047.

The spelling of 13780338 in words is "thirteen million, seven hundred eighty thousand, three hundred thirty-eight".