11921930 has 32 divisors (see below), whose sum is σ = 23924160. Its totient is φ = 4250880.

The previous prime is 11921867. The next prime is 11921933. The reversal of 11921930 is 3912911.

11921930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 11921930.

It is not an unprimeable number, because it can be changed into a prime (11921933) 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, 1385 + ... + 5075.

It is an arithmetic number, because the mean of its divisors is an integer number (747630).

Almost surely, 2^11921930 is an apocalyptic number.

11921930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11921930 is an abundant number, since it is smaller than the sum of its proper divisors (12002230).

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

11921930 is a wasteful number, since it uses less digits than its factorization.

11921930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3734.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 11921930 is about 3452.8147937589. The cubic root of 11921930 is about 228.4452799077.

The spelling of 11921930 in words is "eleven million, nine hundred twenty-one thousand, nine hundred thirty".