123920538 has 32 divisors (see below), whose sum is σ = 293016960. Its totient is φ = 34184640.

The previous prime is 123920501. The next prime is 123920543. The reversal of 123920538 is 835029321.

It is a junction number, because it is equal to n+sod(n) for n = 123920499 and 123920508.

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 15 ways as a sum of consecutive naturals, for example, 49653 + ... + 52088.

It is an arithmetic number, because the mean of its divisors is an integer number (9156780).

Almost surely, 2^123920538 is an apocalyptic number.

123920538 is an abundant number, since it is smaller than the sum of its proper divisors (169096422).

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

123920538 is a wasteful number, since it uses less digits than its factorization.

123920538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101782.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 123920538 is about 11131.9602047438. The cubic root of 123920538 is about 498.5565542722.

Adding to 123920538 its reverse (835029321), we get a palindrome (958949859).

The spelling of 123920538 in words is "one hundred twenty-three million, nine hundred twenty thousand, five hundred thirty-eight".