28220331230 has 128 divisors (see below), whose sum is σ = 64834560000. Its totient is φ = 8601997824.

The previous prime is 28220331179. The next prime is 28220331233. The reversal of 28220331230 is 3213302282.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 28220331230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28220331233) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13167539 + ... + 13169681.

It is an arithmetic number, because the mean of its divisors is an integer number (506520000).

Almost surely, 2^28220331230 is an apocalyptic number.

28220331230 is an abundant number, since it is smaller than the sum of its proper divisors (36614228770).

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

28220331230 is a wasteful number, since it uses less digits than its factorization.

28220331230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2698.

The product of its (nonzero) digits is 3456, while the sum is 26.

The spelling of 28220331230 in words is "twenty-eight billion, two hundred twenty million, three hundred thirty-one thousand, two hundred thirty".