123455398 has 32 divisors (see below), whose sum is σ = 211818240. Its totient is φ = 53417760.

The previous prime is 123455393. The next prime is 123455401. The reversal of 123455398 is 893554321.

It is a self number, because there is not a number n which added to its sum of digits gives 123455398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123455393) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 135661 + ... + 136567.

It is an arithmetic number, because the mean of its divisors is an integer number (6619320).

Almost surely, 2^123455398 is an apocalyptic number.

123455398 is a deficient number, since it is larger than the sum of its proper divisors (88362842).

123455398 is a wasteful number, since it uses less digits than its factorization.

123455398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212.

The product of its digits is 129600, while the sum is 40.

The square root of 123455398 is about 11111.0484653790. The cubic root of 123455398 is about 497.9319891209.

The spelling of 123455398 in words is "one hundred twenty-three million, four hundred fifty-five thousand, three hundred ninety-eight".