13809078 has 24 divisors (see below), whose sum is σ = 30043728. Its totient is φ = 4583952.

The previous prime is 13809073. The next prime is 13809113. The reversal of 13809078 is 87090831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13809071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3276 + ... + 6192.

It is an arithmetic number, because the mean of its divisors is an integer number (1251822).

Almost surely, 2^13809078 is an apocalyptic number.

13809078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13809078 is an abundant number, since it is smaller than the sum of its proper divisors (16234650).

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

13809078 is a wasteful number, since it uses less digits than its factorization.

13809078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3188 (or 3185 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 13809078 is about 3716.0567810517. The cubic root of 13809078 is about 239.9136147437.

The spelling of 13809078 in words is "thirteen million, eight hundred nine thousand, seventy-eight".