123800638 has 8 divisors (see below), whose sum is σ = 199985688. Its totient is φ = 57138744.

The previous prime is 123800629. The next prime is 123800669. The reversal of 123800638 is 836008321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2380756 + ... + 2380807.

It is an arithmetic number, because the mean of its divisors is an integer number (24998211).

Almost surely, 2^123800638 is an apocalyptic number.

123800638 is a deficient number, since it is larger than the sum of its proper divisors (76185050).

123800638 is a wasteful number, since it uses less digits than its factorization.

123800638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4761578.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 123800638 is about 11126.5735067001. The cubic root of 123800638 is about 498.3957086707.

Adding to 123800638 its reverse (836008321), we get a palindrome (959808959).

The spelling of 123800638 in words is "one hundred twenty-three million, eight hundred thousand, six hundred thirty-eight".