123680536 has 16 divisors (see below), whose sum is σ = 265029840. Its totient is φ = 53005920.

The previous prime is 123680507. The next prime is 123680539. The reversal of 123680536 is 635086321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123680539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1104235 + ... + 1104346.

It is an arithmetic number, because the mean of its divisors is an integer number (16564365).

Almost surely, 2^123680536 is an apocalyptic number.

It is an amenable number.

123680536 is an abundant number, since it is smaller than the sum of its proper divisors (141349304).

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

123680536 is a wasteful number, since it uses less digits than its factorization.

123680536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2208594 (or 2208590 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 123680536 is about 11121.1751177652. The cubic root of 123680536 is about 498.2344879385.

The spelling of 123680536 in words is "one hundred twenty-three million, six hundred eighty thousand, five hundred thirty-six".