28663070728572 has 36 divisors (see below), whose sum is σ = 82804426549936. Its totient is φ = 8189448779520.

The previous prime is 28663070728451. The next prime is 28663070728601. The reversal of 28663070728572 is 27582707036682.

28663070728572 is a `hidden beast` number, since 2 + 8 + 6 + 6 + 30 + 7 + 0 + 7 + 28 + 572 = 666.

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

It is a super-2 number, since 2×28663070728572² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

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, 56871171829 + ... + 56871172332.

Almost surely, 2^{28663070728572} is an apocalyptic number.

It is an amenable number.

28663070728572 is an abundant number, since it is smaller than the sum of its proper divisors (54141355821364).

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

28663070728572 is a wasteful number, since it uses less digits than its factorization.

28663070728572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113742344178 (or 113742344173 counting only the distinct ones).

The product of its (nonzero) digits is 94832640, while the sum is 63.

The spelling of 28663070728572 in words is "twenty-eight trillion, six hundred sixty-three billion, seventy million, seven hundred twenty-eight thousand, five hundred seventy-two".