11921738 has 8 divisors (see below), whose sum is σ = 18263232. Its totient is φ = 5833996.

The previous prime is 11921729. The next prime is 11921753. The reversal of 11921738 is 83712911.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 63320 + ... + 63507.

It is an arithmetic number, because the mean of its divisors is an integer number (2282904).

Almost surely, 2^11921738 is an apocalyptic number.

11921738 is a deficient number, since it is larger than the sum of its proper divisors (6341494).

11921738 is a wasteful number, since it uses less digits than its factorization.

11921738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126876.

The product of its digits is 3024, while the sum is 32.

The square root of 11921738 is about 3452.7869902443. The cubic root of 11921738 is about 228.4440535478. Note that the first 3 decimals are identical.

The spelling of 11921738 in words is "eleven million, nine hundred twenty-one thousand, seven hundred thirty-eight".