28812346564 has 9 divisors (see below), whose sum is σ = 50422200591. Its totient is φ = 14406003540.

The previous prime is 28812346561. The next prime is 28812346571. The reversal of 28812346564 is 46564321882.

The square root of 28812346564 is 169742.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28812346561) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 297049 + ... + 381919.

Almost surely, 2^28812346564 is an apocalyptic number.

28812346564 is the 169742-nd square number.

It is an amenable number.

28812346564 is a deficient number, since it is larger than the sum of its proper divisors (21609854027).

28812346564 is an frugal number, since it uses more digits than its factorization.

28812346564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169746 (or 84873 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 49.

Multiplying 28812346564 by its sum of digits (49), we get a square (1411804981636 = 1188194²).

The spelling of 28812346564 in words is "twenty-eight billion, eight hundred twelve million, three hundred forty-six thousand, five hundred sixty-four".