11929890 has 32 divisors (see below), whose sum is σ = 32722560. Its totient is φ = 2726784.

The previous prime is 11929889. The next prime is 11929913. The reversal of 11929890 is 9892911.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28195 + ... + 28614.

It is an arithmetic number, because the mean of its divisors is an integer number (1022580).

Almost surely, 2^11929890 is an apocalyptic number.

11929890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11929890 is an abundant number, since it is smaller than the sum of its proper divisors (20792670).

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

11929890 is a wasteful number, since it uses less digits than its factorization.

11929890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56826.

The product of its (nonzero) digits is 11664, while the sum is 39.

The square root of 11929890 is about 3453.9672841531. The cubic root of 11929890 is about 228.4961111593.

The spelling of 11929890 in words is "eleven million, nine hundred twenty-nine thousand, eight hundred ninety".