28364213012 has 12 divisors (see below), whose sum is σ = 49639810836. Its totient is φ = 14181409920.

The previous prime is 28364213011. The next prime is 28364213063. The reversal of 28364213012 is 21031246382.

It can be written as a sum of positive squares in 2 ways, for example, as 19581524356 + 8782688656 = 139934^2 + 93716^2 .

It is a super-2 number, since 2×28364213012² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28364213012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28364213011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76439 + ... + 250142.

It is an arithmetic number, because the mean of its divisors is an integer number (4136650903).

Almost surely, 2^28364213012 is an apocalyptic number.

It is an amenable number.

28364213012 is a deficient number, since it is larger than the sum of its proper divisors (21275597824).

28364213012 is a wasteful number, since it uses less digits than its factorization.

28364213012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348298 (or 348296 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

Adding to 28364213012 its reverse (21031246382), we get a palindrome (49395459394).

The spelling of 28364213012 in words is "twenty-eight billion, three hundred sixty-four million, two hundred thirteen thousand, twelve".