145328228 has 12 divisors (see below), whose sum is σ = 255643500. Its totient is φ = 72287232.

The previous prime is 145328221. The next prime is 145328273. The reversal of 145328228 is 822823541.

It can be written as a sum of positive squares in 2 ways, for example, as 12802084 + 132526144 = 3578^2 + 11512^2 .

It is a super-2 number, since 2×145328228² = 42240587707239968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145328221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93353 + ... + 94896.

It is an arithmetic number, because the mean of its divisors is an integer number (21303625).

Almost surely, 2^145328228 is an apocalyptic number.

It is an amenable number.

145328228 is a deficient number, since it is larger than the sum of its proper divisors (110315272).

145328228 is a wasteful number, since it uses less digits than its factorization.

145328228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188446 (or 188444 counting only the distinct ones).

The product of its digits is 30720, while the sum is 35.

The square root of 145328228 is about 12055.2158006400. The cubic root of 145328228 is about 525.7548964797.

The spelling of 145328228 in words is "one hundred forty-five million, three hundred twenty-eight thousand, two hundred twenty-eight".