28321126452 has 36 divisors (see below), whose sum is σ = 74702103840. Its totient is φ = 9029924112.

The previous prime is 28321126439. The next prime is 28321126499. The reversal of 28321126452 is 25462112382.

28321126452 is a `hidden beast` number, since 2 + 8 + 3 + 2 + 1 + 1 + 2 + 645 + 2 = 666.

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

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 17101302 + ... + 17102957.

It is an arithmetic number, because the mean of its divisors is an integer number (2075058440).

Almost surely, 2^28321126452 is an apocalyptic number.

It is an amenable number.

28321126452 is an abundant number, since it is smaller than the sum of its proper divisors (46380977388).

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

28321126452 is a wasteful number, since it uses less digits than its factorization.

28321126452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34204292 (or 34204287 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The spelling of 28321126452 in words is "twenty-eight billion, three hundred twenty-one million, one hundred twenty-six thousand, four hundred fifty-two".