28212167700 has 72 divisors (see below), whose sum is σ = 90696903360. Its totient is φ = 7523244000.

The previous prime is 28212167677. The next prime is 28212167771. The reversal of 28212167700 is 776121282.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5221776 + ... + 5227175.

Almost surely, 2^28212167700 is an apocalyptic number.

28212167700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28212167700 is an abundant number, since it is smaller than the sum of its proper divisors (62484735660).

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

28212167700 is a wasteful number, since it uses less digits than its factorization.

28212167700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10448974 (or 10448961 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

Adding to 28212167700 its reverse (776121282), we get a palindrome (28988288982).

The spelling of 28212167700 in words is "twenty-eight billion, two hundred twelve million, one hundred sixty-seven thousand, seven hundred".