11940780 has 48 divisors (see below), whose sum is σ = 33917184. Its totient is φ = 3138240.

The previous prime is 11940763. The next prime is 11940787. The reversal of 11940780 is 8704911.

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

It is not an unprimeable number, because it can be changed into a prime (11940787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2859 + ... + 5661.

It is an arithmetic number, because the mean of its divisors is an integer number (706608).

Almost surely, 2^11940780 is an apocalyptic number.

11940780 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 11940780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16958592).

11940780 is an abundant number, since it is smaller than the sum of its proper divisors (21976404).

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

11940780 is a wasteful number, since it uses less digits than its factorization.

11940780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2886 (or 2884 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 11940780 is about 3455.5433726116. The cubic root of 11940780 is about 228.5656162957.

It can be divided in two parts, 11940 and 780, that added together give a triangular number (12720 = T₁₅₉).

The spelling of 11940780 in words is "eleven million, nine hundred forty thousand, seven hundred eighty".