1228790738 has 18 divisors (see below), whose sum is σ = 2144720133. Its totient is φ = 526475880.

The previous prime is 1228790729. The next prime is 1228790767. The reversal of 1228790738 is 8370978221.

It can be written as a sum of positive squares in 2 ways, for example, as 1220593969 + 8196769 = 34937^2 + 2863^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=24787.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1228790692 and 1228790701.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 345248 + ... + 348788.

Almost surely, 2^1228790738 is an apocalyptic number.

1228790738 is a deficient number, since it is larger than the sum of its proper divisors (915929395).

1228790738 is an frugal number, since it uses more digits than its factorization.

1228790738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7098 (or 3550 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 1228790738 is about 35054.1115705419. Note that the first 3 decimals coincide. The cubic root of 1228790738 is about 1071.0900290275.

The spelling of 1228790738 in words is "one billion, two hundred twenty-eight million, seven hundred ninety thousand, seven hundred thirty-eight".