11911930 has 32 divisors (see below), whose sum is σ = 22737024. Its totient is φ = 4483776.

The previous prime is 11911927. The next prime is 11911931. The reversal of 11911930 is 3911911.

It is a junction number, because it is equal to n+sod(n) for n = 11911895 and 11911904.

It is not an unprimeable number, because it can be changed into a prime (11911931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15024 + ... + 15796.

It is an arithmetic number, because the mean of its divisors is an integer number (710532).

Almost surely, 2^11911930 is an apocalyptic number.

11911930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11911930 is a deficient number, since it is larger than the sum of its proper divisors (10825094).

11911930 is a wasteful number, since it uses less digits than its factorization.

11911930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870.

The product of its (nonzero) digits is 243, while the sum is 25.

The square root of 11911930 is about 3451.3663960814. The cubic root of 11911930 is about 228.3813894743.

The spelling of 11911930 in words is "eleven million, nine hundred eleven thousand, nine hundred thirty".