228145146 has 32 divisors (see below), whose sum is σ = 475675200. Its totient is φ = 72858240.

The previous prime is 228145123. The next prime is 228145187. The reversal of 228145146 is 641541822.

It is a happy number.

It is a super-2 number, since 2×228145146² = 104100415286722632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17790 + ... + 27798.

It is an arithmetic number, because the mean of its divisors is an integer number (14864850).

Almost surely, 2^228145146 is an apocalyptic number.

228145146 is an abundant number, since it is smaller than the sum of its proper divisors (247530054).

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

228145146 is a wasteful number, since it uses less digits than its factorization.

228145146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10174.

The product of its digits is 15360, while the sum is 33.

The square root of 228145146 is about 15104.4743701991. The cubic root of 228145146 is about 611.0410834162.

Adding to 228145146 its reverse (641541822), we get a palindrome (869686968).

The spelling of 228145146 in words is "two hundred twenty-eight million, one hundred forty-five thousand, one hundred forty-six".