11859780 has 48 divisors (see below), whose sum is σ = 33445440. Its totient is φ = 3139968.

The previous prime is 11859751. The next prime is 11859791. The reversal of 11859780 is 8795811.

It is an unprimeable number.

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, 8791 + ... + 10049.

It is an arithmetic number, because the mean of its divisors is an integer number (696780).

Almost surely, 2^11859780 is an apocalyptic number.

11859780 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 11859780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16722720).

11859780 is an abundant number, since it is smaller than the sum of its proper divisors (21585660).

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

11859780 is a wasteful number, since it uses less digits than its factorization.

11859780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428 (or 1426 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 39.

The square root of 11859780 is about 3443.8031302617. The cubic root of 11859780 is about 228.0476200934.

The spelling of 11859780 in words is "eleven million, eight hundred fifty-nine thousand, seven hundred eighty".