123988536 has 64 divisors (see below), whose sum is σ = 393619200. Its totient is φ = 35424864.

The previous prime is 123988523. The next prime is 123988537. The reversal of 123988536 is 635889321.

It is a happy number.

123988536 is a `hidden beast` number, since 1 + 2 + 39 + 88 + 536 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 123988491 and 123988500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123988537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39490 + ... + 42513.

It is an arithmetic number, because the mean of its divisors is an integer number (6150300).

Almost surely, 2^123988536 is an apocalyptic number.

It is an amenable number.

123988536 is an abundant number, since it is smaller than the sum of its proper divisors (269630664).

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

123988536 is a wasteful number, since it uses less digits than its factorization.

123988536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82025 (or 82015 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 123988536 is about 11135.0139649665. The cubic root of 123988536 is about 498.6477273478.

The spelling of 123988536 in words is "one hundred twenty-three million, nine hundred eighty-eight thousand, five hundred thirty-six".