228131730 has 48 divisors (see below), whose sum is σ = 599039064. Its totient is φ = 60230400.

The previous prime is 228131699. The next prime is 228131731. The reversal of 228131730 is 37131822.

It can be written as a sum of positive squares in 4 ways, for example, as 210917529 + 17214201 = 14523^2 + 4149^2 .

It is a junction number, because it is equal to n+sod(n) for n = 228131694 and 228131703.

It is not an unprimeable number, because it can be changed into a prime (228131731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3459 + ... + 21638.

Almost surely, 2^228131730 is an apocalyptic number.

228131730 is an abundant number, since it is smaller than the sum of its proper divisors (370907334).

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

228131730 is a wasteful number, since it uses less digits than its factorization.

228131730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25211 (or 25208 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 228131730 is about 15104.0302568553. The cubic root of 228131730 is about 611.0291058251.

The spelling of 228131730 in words is "two hundred twenty-eight million, one hundred thirty-one thousand, seven hundred thirty".