11969128 has 8 divisors (see below), whose sum is σ = 22442130. Its totient is φ = 5984560.

The previous prime is 11969119. The next prime is 11969137. The reversal of 11969128 is 82196911.

It is an interprime number because it is at equal distance from previous prime (11969119) and next prime (11969137).

It can be written as a sum of positive squares in only one way, i.e., 7717284 + 4251844 = 2778^2 + 2062^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 748063 + ... + 748078.

Almost surely, 2^11969128 is an apocalyptic number.

It is an amenable number.

11969128 is a deficient number, since it is larger than the sum of its proper divisors (10473002).

11969128 is a wasteful number, since it uses less digits than its factorization.

11969128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496147 (or 1496143 counting only the distinct ones).

The product of its digits is 7776, while the sum is 37.

The square root of 11969128 is about 3459.6427561238. The cubic root of 11969128 is about 228.7463486930.

The spelling of 11969128 in words is "eleven million, nine hundred sixty-nine thousand, one hundred twenty-eight".