145808228 has 12 divisors (see below), whose sum is σ = 255266172. Its totient is φ = 72875040.

The previous prime is 145808213. The next prime is 145808249. The reversal of 145808228 is 822808541.

It can be written as a sum of positive squares in 2 ways, for example, as 130142464 + 15665764 = 11408^2 + 3958^2 .

It is a junction number, because it is equal to n+sod(n) for n = 145808191 and 145808200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7226 + ... + 18542.

It is an arithmetic number, because the mean of its divisors is an integer number (21272181).

Almost surely, 2^145808228 is an apocalyptic number.

It is an amenable number.

145808228 is a deficient number, since it is larger than the sum of its proper divisors (109457944).

145808228 is a wasteful number, since it uses less digits than its factorization.

145808228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14542 (or 14540 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 38.

The square root of 145808228 is about 12075.1077841980. The cubic root of 145808228 is about 526.3330934402. Note that the first 3 decimals are identical.

The spelling of 145808228 in words is "one hundred forty-five million, eight hundred eight thousand, two hundred twenty-eight".