123028857 has 36 divisors (see below), whose sum is σ = 217616880. Its totient is φ = 66597552.

The previous prime is 123028831. The next prime is 123028889. The reversal of 123028857 is 758820321.

It is not a de Polignac number, because 123028857 - 2⁶ = 123028793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123028897) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1038 + ... + 15720.

Almost surely, 2^123028857 is an apocalyptic number.

It is an amenable number.

123028857 is a deficient number, since it is larger than the sum of its proper divisors (94588023).

123028857 is a wasteful number, since it uses less digits than its factorization.

123028857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14722 (or 14712 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 123028857 is about 11091.8374041454. The cubic root of 123028857 is about 497.3578722476.

The spelling of 123028857 in words is "one hundred twenty-three million, twenty-eight thousand, eight hundred fifty-seven".