11977680 has 160 divisors (see below), whose sum is σ = 43747200. Its totient is φ = 2672640.

The previous prime is 11977633. The next prime is 11977681. The reversal of 11977680 is 8677911.

11977680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11977681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34146 + ... + 34494.

It is an arithmetic number, because the mean of its divisors is an integer number (273420).

Almost surely, 2^11977680 is an apocalyptic number.

11977680 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 11977680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21873600).

11977680 is an abundant number, since it is smaller than the sum of its proper divisors (31769520).

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

11977680 is a wasteful number, since it uses less digits than its factorization.

11977680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 39.

The square root of 11977680 is about 3460.8785011901. The cubic root of 11977680 is about 228.8008158479.

The spelling of 11977680 in words is "eleven million, nine hundred seventy-seven thousand, six hundred eighty".