13965778 has 16 divisors (see below), whose sum is σ = 21386880. Its totient is φ = 6838416.

The previous prime is 13965773. The next prime is 13965781. The reversal of 13965778 is 87756931.

13965778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (13965773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24525 + ... + 25087.

It is an arithmetic number, because the mean of its divisors is an integer number (1336680).

Almost surely, 2^13965778 is an apocalyptic number.

13965778 is a deficient number, since it is larger than the sum of its proper divisors (7421102).

13965778 is a wasteful number, since it uses less digits than its factorization.

13965778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801.

The product of its digits is 317520, while the sum is 46.

The square root of 13965778 is about 3737.0814815843. The cubic root of 13965778 is about 240.8176855000.

The spelling of 13965778 in words is "thirteen million, nine hundred sixty-five thousand, seven hundred seventy-eight".