11921788 has 24 divisors (see below), whose sum is σ = 21344400. Its totient is φ = 5825280.

The previous prime is 11921773. The next prime is 11921827. The reversal of 11921788 is 88712911.

11921788 is a modest number, since divided by 1788 gives 1192 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49348 + ... + 49588.

It is an arithmetic number, because the mean of its divisors is an integer number (889350).

Almost surely, 2^11921788 is an apocalyptic number.

It is an amenable number.

11921788 is a deficient number, since it is larger than the sum of its proper divisors (9422612).

11921788 is a wasteful number, since it uses less digits than its factorization.

11921788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477 (or 475 counting only the distinct ones).

The product of its digits is 8064, while the sum is 37.

The square root of 11921788 is about 3452.7942307644. The cubic root of 11921788 is about 228.4443729136. Note that the first 3 decimals are identical.

The spelling of 11921788 in words is "eleven million, nine hundred twenty-one thousand, seven hundred eighty-eight".