11997628 has 12 divisors (see below), whose sum is σ = 21908880. Its totient is φ = 5737952.

The previous prime is 11997617. The next prime is 11997637. The reversal of 11997628 is 82679911.

It is a congruent number.

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, 65113 + ... + 65296.

It is an arithmetic number, because the mean of its divisors is an integer number (1825740).

Almost surely, 2^11997628 is an apocalyptic number.

It is an amenable number.

11997628 is a deficient number, since it is larger than the sum of its proper divisors (9911252).

11997628 is a wasteful number, since it uses less digits than its factorization.

11997628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130436 (or 130434 counting only the distinct ones).

The product of its digits is 54432, while the sum is 43.

The square root of 11997628 is about 3463.7592295077. The cubic root of 11997628 is about 228.9277627267.

The spelling of 11997628 in words is "eleven million, nine hundred ninety-seven thousand, six hundred twenty-eight".