28564872452 has 6 divisors (see below), whose sum is σ = 49988526798. Its totient is φ = 14282436224.

The previous prime is 28564872443. The next prime is 28564872461. The reversal of 28564872452 is 25427846582.

It is an interprime number because it is at equal distance from previous prime (28564872443) and next prime (28564872461).

It can be written as a sum of positive squares in only one way, i.e., 25457478916 + 3107393536 = 159554^2 + 55744^2 .

It is a super-4 number, since 4×28564872452⁴ (a number of 43 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28564872394 and 28564872403.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3570609053 + ... + 3570609060.

It is an arithmetic number, because the mean of its divisors is an integer number (8331421133).

Almost surely, 2^28564872452 is an apocalyptic number.

It is an amenable number.

28564872452 is a deficient number, since it is larger than the sum of its proper divisors (21423654346).

28564872452 is a wasteful number, since it uses less digits than its factorization.

28564872452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7141218117 (or 7141218115 counting only the distinct ones).

The product of its digits is 8601600, while the sum is 53.

The spelling of 28564872452 in words is "twenty-eight billion, five hundred sixty-four million, eight hundred seventy-two thousand, four hundred fifty-two".