11504312028 has 36 divisors (see below), whose sum is σ = 31724013048. Its totient is φ = 3486155040.

The previous prime is 11504312011. The next prime is 11504312041. The reversal of 11504312028 is 82021340511.

11504312028 is a `hidden beast` number, since 11 + 504 + 3 + 120 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 11504311992 and 11504312010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14525251 + ... + 14526042.

Almost surely, 2^11504312028 is an apocalyptic number.

11504312028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11504312028 is an abundant number, since it is smaller than the sum of its proper divisors (20219701020).

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

11504312028 is a wasteful number, since it uses less digits than its factorization.

11504312028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29051314 (or 29051309 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

Adding to 11504312028 its reverse (82021340511), we get a palindrome (93525652539).

The spelling of 11504312028 in words is "eleven billion, five hundred four million, three hundred twelve thousand, twenty-eight".