123798636 has 36 divisors (see below), whose sum is σ = 337008672. Its totient is φ = 38091744.

The previous prime is 123798617. The next prime is 123798643. The reversal of 123798636 is 636897321.

123798636 is a `hidden beast` number, since 1 + 2 + 3 + 7 + 9 + 8 + 636 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×123798636² = 30652204550920992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123798591 and 123798600.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131796 + ... + 132731.

It is an arithmetic number, because the mean of its divisors is an integer number (9361352).

Almost surely, 2^123798636 is an apocalyptic number.

It is an amenable number.

123798636 is an abundant number, since it is smaller than the sum of its proper divisors (213210036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123798636 is a wasteful number, since it uses less digits than its factorization.

123798636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264550 (or 264545 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 123798636 is about 11126.4835415328. The cubic root of 123798636 is about 498.3930221106.

The spelling of 123798636 in words is "one hundred twenty-three million, seven hundred ninety-eight thousand, six hundred thirty-six".