11973780 has 288 divisors, whose sum is σ = 48432384. Its totient is φ = 2322432.

The previous prime is 11973779. The next prime is 11973791. The reversal of 11973780 is 8737911.

11973780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 278439 + ... + 278481.

It is an arithmetic number, because the mean of its divisors is an integer number (168168).

Almost surely, 2^11973780 is an apocalyptic number.

11973780 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 11973780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24216192).

11973780 is an abundant number, since it is smaller than the sum of its proper divisors (36458604).

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

11973780 is a wasteful number, since it uses less digits than its factorization.

11973780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 11973780 is about 3460.3150145615. The cubic root of 11973780 is about 228.7759802078.

The spelling of 11973780 in words is "eleven million, nine hundred seventy-three thousand, seven hundred eighty".