28663212332200 has 48 divisors (see below), whose sum is σ = 66706482191580. Its totient is φ = 11454185832960.

The previous prime is 28663212332191. The next prime is 28663212332291. The reversal of 28663212332200 is 223321236682.

It can be written as a sum of positive squares in 6 ways, for example, as 14296823080996 + 14366389251204 = 3781114^2 + 3790302^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 69162259 + ... + 69575458.

Almost surely, 2^{28663212332200} is an apocalyptic number.

28663212332200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28663212332200 is an abundant number, since it is smaller than the sum of its proper divisors (38043269859380).

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

28663212332200 is a wasteful number, since it uses less digits than its factorization.

28663212332200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138738766 (or 138738757 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 40.

Adding to 28663212332200 its reverse (223321236682), we get a palindrome (28886533568882).

The spelling of 28663212332200 in words is "twenty-eight trillion, six hundred sixty-three billion, two hundred twelve million, three hundred thirty-two thousand, two hundred".