123328540 has 48 divisors (see below), whose sum is σ = 283094784. Its totient is φ = 44928000.

The previous prime is 123328537. The next prime is 123328567. The reversal of 123328540 is 45823321.

It is a junction number, because it is equal to n+sod(n) for n = 123328499 and 123328508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4690 + ... + 16390.

It is an arithmetic number, because the mean of its divisors is an integer number (5897808).

Almost surely, 2^123328540 is an apocalyptic number.

123328540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123328540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141547392).

123328540 is an abundant number, since it is smaller than the sum of its proper divisors (159766244).

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

123328540 is a wasteful number, since it uses less digits than its factorization.

123328540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11758 (or 11756 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 123328540 is about 11105.3383559440. The cubic root of 123328540 is about 497.7613787749.

The spelling of 123328540 in words is "one hundred twenty-three million, three hundred twenty-eight thousand, five hundred forty".