123863540 has 24 divisors (see below), whose sum is σ = 261469320. Its totient is φ = 49287168.

The previous prime is 123863539. The next prime is 123863561. The reversal of 123863540 is 45368321.

It can be written as a sum of positive squares in 4 ways, for example, as 2951524 + 120912016 = 1718^2 + 10996^2 .

It is a junction number, because it is equal to n+sod(n) for n = 123863497 and 123863506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12185 + ... + 19904.

It is an arithmetic number, because the mean of its divisors is an integer number (10894555).

Almost surely, 2^123863540 is an apocalyptic number.

123863540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123863540 is an abundant number, since it is smaller than the sum of its proper divisors (137605780).

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

123863540 is a wasteful number, since it uses less digits than its factorization.

123863540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32291 (or 32289 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 123863540 is about 11129.3998041224. The cubic root of 123863540 is about 498.4801045169.

The spelling of 123863540 in words is "one hundred twenty-three million, eight hundred sixty-three thousand, five hundred forty".