123128948 has 6 divisors (see below), whose sum is σ = 215475666. Its totient is φ = 61564472.

The previous prime is 123128947. The next prime is 123128963. The reversal of 123128948 is 849821321.

It can be written as a sum of positive squares in only one way, i.e., 63808144 + 59320804 = 7988^2 + 7702^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123128947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15391115 + ... + 15391122.

It is an arithmetic number, because the mean of its divisors is an integer number (35912611).

Almost surely, 2^123128948 is an apocalyptic number.

It is an amenable number.

123128948 is a deficient number, since it is larger than the sum of its proper divisors (92346718).

123128948 is a wasteful number, since it uses less digits than its factorization.

123128948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30782241 (or 30782239 counting only the distinct ones).

The product of its digits is 27648, while the sum is 38.

The square root of 123128948 is about 11096.3484083729. The cubic root of 123128948 is about 497.4927120301.

The spelling of 123128948 in words is "one hundred twenty-three million, one hundred twenty-eight thousand, nine hundred forty-eight".