148209228 has 18 divisors (see below), whose sum is σ = 374640084. Its totient is φ = 49403064.

The previous prime is 148209221. The next prime is 148209287. The reversal of 148209228 is 822902841.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 4116923 = 148209228 / (1 + 4 + 8 + 2 + 0 + 9 + 2 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 148209192 and 148209201.

It is not an unprimeable number, because it can be changed into a prime (148209221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2058426 + ... + 2058497.

It is an arithmetic number, because the mean of its divisors is an integer number (20813338).

Almost surely, 2^148209228 is an apocalyptic number.

148209228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

148209228 is an abundant number, since it is smaller than the sum of its proper divisors (226430856).

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

148209228 is a wasteful number, since it uses less digits than its factorization.

148209228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4116933 (or 4116928 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 148209228 is about 12174.1212413874. The cubic root of 148209228 is about 529.2063926638.

The spelling of 148209228 in words is "one hundred forty-eight million, two hundred nine thousand, two hundred twenty-eight".