13780455 has 32 divisors (see below), whose sum is σ = 25147584. Its totient is φ = 6383616.

The previous prime is 13780441. The next prime is 13780457. The reversal of 13780455 is 55408731.

It is not a de Polignac number, because 13780455 - 2⁴ = 13780439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13780457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1237 + ... + 5393.

It is an arithmetic number, because the mean of its divisors is an integer number (785862).

Almost surely, 2^13780455 is an apocalyptic number.

13780455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13780455 is a deficient number, since it is larger than the sum of its proper divisors (11367129).

13780455 is a wasteful number, since it uses less digits than its factorization.

13780455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4195.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 13780455 is about 3712.2035235154. The cubic root of 13780455 is about 239.7477384155.

The spelling of 13780455 in words is "thirteen million, seven hundred eighty thousand, four hundred fifty-five".