13955778 has 24 divisors (see below), whose sum is σ = 30553068. Its totient is φ = 4603392.

The previous prime is 13955761. The next prime is 13955783. The reversal of 13955778 is 87755931.

13955778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12981609 + 974169 = 3603^2 + 987^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2251 + ... + 5742.

Almost surely, 2^13955778 is an apocalyptic number.

13955778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13955778 is an abundant number, since it is smaller than the sum of its proper divisors (16597290).

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

13955778 is a wasteful number, since it uses less digits than its factorization.

13955778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8098 (or 8095 counting only the distinct ones).

The product of its digits is 264600, while the sum is 45.

The square root of 13955778 is about 3735.7432995322. The cubic root of 13955778 is about 240.7601937306.

The spelling of 13955778 in words is "thirteen million, nine hundred fifty-five thousand, seven hundred seventy-eight".