13455780 has 72 divisors (see below), whose sum is σ = 40828032. Its totient is φ = 3309696.

The previous prime is 13455779. The next prime is 13455787. The reversal of 13455780 is 8755431.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (13455787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9477 + ... + 10803.

It is an arithmetic number, because the mean of its divisors is an integer number (567056).

Almost surely, 2^13455780 is an apocalyptic number.

13455780 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 13455780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20414016).

13455780 is an abundant number, since it is smaller than the sum of its proper divisors (27372252).

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

13455780 is a wasteful number, since it uses less digits than its factorization.

13455780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1365 (or 1350 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 13455780 is about 3668.2120985570. The cubic root of 13455780 is about 237.8498924001.

The spelling of 13455780 in words is "thirteen million, four hundred fifty-five thousand, seven hundred eighty".