11867229728 has 24 divisors (see below), whose sum is σ = 23369382288. Its totient is φ = 5932148544.

The previous prime is 11867229727. The next prime is 11867229749. The reversal of 11867229728 is 82792276811.

It is a super-2 number, since 2×11867229728² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11867229728.

It is not an unprimeable number, because it can be changed into a prime (11867229721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92075 + ... + 179477.

It is an arithmetic number, because the mean of its divisors is an integer number (973724262).

Almost surely, 2^11867229728 is an apocalyptic number.

It is an amenable number.

11867229728 is a deficient number, since it is larger than the sum of its proper divisors (11502152560).

11867229728 is an equidigital number, since it uses as much as digits as its factorization.

11867229728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91656 (or 91648 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 53.

The spelling of 11867229728 in words is "eleven billion, eight hundred sixty-seven million, two hundred twenty-nine thousand, seven hundred twenty-eight".