11997930 has 128 divisors (see below), whose sum is σ = 36126720. Its totient is φ = 2488320.

The previous prime is 11997929. The next prime is 11997943. The reversal of 11997930 is 3979911.

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 63 ways as a sum of consecutive naturals, for example, 123642 + ... + 123738.

It is an arithmetic number, because the mean of its divisors is an integer number (282240).

Almost surely, 2^11997930 is an apocalyptic number.

11997930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11997930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18063360).

11997930 is an abundant number, since it is smaller than the sum of its proper divisors (24128790).

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

11997930 is a wasteful number, since it uses less digits than its factorization.

11997930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164.

The product of its (nonzero) digits is 15309, while the sum is 39.

The square root of 11997930 is about 3463.8028234875. The cubic root of 11997930 is about 228.9296835399.

The spelling of 11997930 in words is "eleven million, nine hundred ninety-seven thousand, nine hundred thirty".