28663724412 has 36 divisors (see below), whose sum is σ = 76717616976. Its totient is φ = 8992540800.

The previous prime is 28663724399. The next prime is 28663724413. The reversal of 28663724412 is 21442736682.

It is a happy number.

28663724412 is a `hidden beast` number, since 2 + 8 + 6 + 637 + 2 + 4 + 4 + 1 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28663724413) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23417464 + ... + 23418687.

It is an arithmetic number, because the mean of its divisors is an integer number (2131044916).

Almost surely, 2^28663724412 is an apocalyptic number.

It is an amenable number.

28663724412 is an abundant number, since it is smaller than the sum of its proper divisors (48053892564).

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

28663724412 is a wasteful number, since it uses less digits than its factorization.

28663724412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46836178 (or 46836173 counting only the distinct ones).

The product of its digits is 774144, while the sum is 45.

The spelling of 28663724412 in words is "twenty-eight billion, six hundred sixty-three million, seven hundred twenty-four thousand, four hundred twelve".