123638936 has 8 divisors (see below), whose sum is σ = 231823020. Its totient is φ = 61819464.

The previous prime is 123638929. The next prime is 123638953. The reversal of 123638936 is 639836321.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 123638893 and 123638902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7727426 + ... + 7727441.

Almost surely, 2^123638936 is an apocalyptic number.

It is an amenable number.

123638936 is a deficient number, since it is larger than the sum of its proper divisors (108184084).

123638936 is a wasteful number, since it uses less digits than its factorization.

123638936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15454873 (or 15454869 counting only the distinct ones).

The product of its digits is 139968, while the sum is 41.

The square root of 123638936 is about 11119.3046545186. The cubic root of 123638936 is about 498.1786212150.

The spelling of 123638936 in words is "one hundred twenty-three million, six hundred thirty-eight thousand, nine hundred thirty-six".