13978055 has 32 divisors (see below), whose sum is σ = 21331968. Its totient is φ = 8553600.

The previous prime is 13978033. The next prime is 13978057. The reversal of 13978055 is 55087931.

It is not a de Polignac number, because 13978055 - 2¹⁴ = 13961671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13978057) 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, 13610 + ... + 14600.

It is an arithmetic number, because the mean of its divisors is an integer number (666624).

Almost surely, 2^13978055 is an apocalyptic number.

13978055 is a deficient number, since it is larger than the sum of its proper divisors (7353913).

13978055 is a wasteful number, since it uses less digits than its factorization.

13978055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 13978055 is about 3738.7237127127. The cubic root of 13978055 is about 240.8882306285. Note that the first 3 decimals are identical.

The spelling of 13978055 in words is "thirteen million, nine hundred seventy-eight thousand, fifty-five".