1228909148 has 24 divisors (see below), whose sum is σ = 2180068800. Its totient is φ = 606048768.

The previous prime is 1228909139. The next prime is 1228909153. The reversal of 1228909148 is 8419098221.

It is a junction number, because it is equal to n+sod(n) for n = 1228909099 and 1228909108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 507236 + ... + 509652.

It is an arithmetic number, because the mean of its divisors is an integer number (90836200).

Almost surely, 2^1228909148 is an apocalyptic number.

It is an amenable number.

1228909148 is a deficient number, since it is larger than the sum of its proper divisors (951159652).

1228909148 is a wasteful number, since it uses less digits than its factorization.

1228909148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4109 (or 4107 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 44.

The square root of 1228909148 is about 35055.8004900758. The cubic root of 1228909148 is about 1071.1244324163.

The spelling of 1228909148 in words is "one billion, two hundred twenty-eight million, nine hundred nine thousand, one hundred forty-eight".