11989928 has 8 divisors (see below), whose sum is σ = 22481130. Its totient is φ = 5994960.

The previous prime is 11989927. The next prime is 11989951. The reversal of 11989928 is 82998911.

It can be written as a sum of positive squares in only one way, i.e., 10252804 + 1737124 = 3202^2 + 1318^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (11989927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 749363 + ... + 749378.

Almost surely, 2^11989928 is an apocalyptic number.

It is an amenable number.

11989928 is a deficient number, since it is larger than the sum of its proper divisors (10491202).

11989928 is a wasteful number, since it uses less digits than its factorization.

11989928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498747 (or 1498743 counting only the distinct ones).

The product of its digits is 93312, while the sum is 47.

The square root of 11989928 is about 3462.6475419829. The cubic root of 11989928 is about 228.8787774603.

The spelling of 11989928 in words is "eleven million, nine hundred eighty-nine thousand, nine hundred twenty-eight".