11920380 has 24 divisors (see below), whose sum is σ = 33377232. Its totient is φ = 3178752.

The previous prime is 11920379. The next prime is 11920387. The reversal of 11920380 is 8302911.

It is a self number, because there is not a number n which added to its sum of digits gives 11920380.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11920387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99277 + ... + 99396.

It is an arithmetic number, because the mean of its divisors is an integer number (1390718).

Almost surely, 2^11920380 is an apocalyptic number.

11920380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11920380 is an abundant number, since it is smaller than the sum of its proper divisors (21456852).

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

11920380 is a wasteful number, since it uses less digits than its factorization.

11920380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198685 (or 198683 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 11920380 is about 3452.5903319102. The cubic root of 11920380 is about 228.4353792308.

The spelling of 11920380 in words is "eleven million, nine hundred twenty thousand, three hundred eighty".