13793780 has 144 divisors (see below), whose sum is σ = 39844224. Its totient is φ = 3893760.

The previous prime is 13793777. The next prime is 13793789. The reversal of 13793780 is 8739731.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13793789) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 260234 + ... + 260286.

It is an arithmetic number, because the mean of its divisors is an integer number (276696).

Almost surely, 2^13793780 is an apocalyptic number.

13793780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13793780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19922112).

13793780 is an abundant number, since it is smaller than the sum of its proper divisors (26050444).

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

13793780 is a wasteful number, since it uses less digits than its factorization.

13793780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 13793780 is about 3713.9978459875. The cubic root of 13793780 is about 239.8249881503.

The spelling of 13793780 in words is "thirteen million, seven hundred ninety-three thousand, seven hundred eighty".