11355780 has 48 divisors (see below), whose sum is σ = 32405184. Its totient is φ = 2970240.

The previous prime is 11355761. The next prime is 11355797. The reversal of 11355780 is 8755311.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1395 + ... + 4965.

It is an arithmetic number, because the mean of its divisors is an integer number (675108).

Almost surely, 2^11355780 is an apocalyptic number.

11355780 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 11355780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16202592).

11355780 is an abundant number, since it is smaller than the sum of its proper divisors (21049404).

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

11355780 is a wasteful number, since it uses less digits than its factorization.

11355780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3636 (or 3634 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 11355780 is about 3369.8338237961. The cubic root of 11355780 is about 224.7703335513.

The spelling of 11355780 in words is "eleven million, three hundred fifty-five thousand, seven hundred eighty".