11211585828 has 12 divisors (see below), whose sum is σ = 26160366960. Its totient is φ = 3737195272.

The previous prime is 11211585811. The next prime is 11211585851. The reversal of 11211585828 is 82858511211.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×11211585828² (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 11211585828.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467149398 + ... + 467149421.

It is an arithmetic number, because the mean of its divisors is an integer number (2180030580).

Almost surely, 2^11211585828 is an apocalyptic number.

It is an amenable number.

11211585828 is an abundant number, since it is smaller than the sum of its proper divisors (14948781132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11211585828 is a wasteful number, since it uses less digits than its factorization.

11211585828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934298826 (or 934298824 counting only the distinct ones).

The product of its digits is 51200, while the sum is 42.

The spelling of 11211585828 in words is "eleven billion, two hundred eleven million, five hundred eighty-five thousand, eight hundred twenty-eight".