28742430212 has 12 divisors (see below), whose sum is σ = 51248295756. Its totient is φ = 14100060000.

The previous prime is 28742430193. The next prime is 28742430293. The reversal of 28742430212 is 21203424782.

It can be written as a sum of positive squares in 2 ways, for example, as 23065711876 + 5676718336 = 151874^2 + 75344^2 .

It is a super-2 number, since 2×28742430212² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67788539 + ... + 67788962.

It is an arithmetic number, because the mean of its divisors is an integer number (4270691313).

Almost surely, 2^28742430212 is an apocalyptic number.

It is an amenable number.

28742430212 is a deficient number, since it is larger than the sum of its proper divisors (22505865544).

28742430212 is a wasteful number, since it uses less digits than its factorization.

28742430212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135577558 (or 135577556 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 35.

Adding to 28742430212 its reverse (21203424782), we get a palindrome (49945854994).

The spelling of 28742430212 in words is "twenty-eight billion, seven hundred forty-two million, four hundred thirty thousand, two hundred twelve".