28156350222 has 384 divisors, whose sum is σ = 87730126848. Its totient is φ = 6529507200.

The previous prime is 28156350221. The next prime is 28156350227. The reversal of 28156350222 is 22205365182.

It is a happy number.

28156350222 is a `hidden beast` number, since 2 + 8 + 15 + 635 + 0 + 2 + 2 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28156350221) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 15080133 + ... + 15081999.

It is an arithmetic number, because the mean of its divisors is an integer number (228463872).

Almost surely, 2^28156350222 is an apocalyptic number.

28156350222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 28156350222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43865063424).

28156350222 is an abundant number, since it is smaller than the sum of its proper divisors (59573776626).

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

28156350222 is a wasteful number, since it uses less digits than its factorization.

28156350222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946 (or 1934 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 28156350222 in words is "twenty-eight billion, one hundred fifty-six million, three hundred fifty thousand, two hundred twenty-two".