123933540 has 24 divisors (see below), whose sum is σ = 347014080. Its totient is φ = 33048928.

The previous prime is 123933521. The next prime is 123933547. The reversal of 123933540 is 45339321.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 123933498 and 123933507.

It is not an unprimeable number, because it can be changed into a prime (123933547) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1032720 + ... + 1032839.

It is an arithmetic number, because the mean of its divisors is an integer number (14458920).

Almost surely, 2^123933540 is an apocalyptic number.

123933540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123933540 is an abundant number, since it is smaller than the sum of its proper divisors (223080540).

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

123933540 is a wasteful number, since it uses less digits than its factorization.

123933540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065571 (or 2065569 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 123933540 is about 11132.5441836087. The cubic root of 123933540 is about 498.5739901918.

The spelling of 123933540 in words is "one hundred twenty-three million, nine hundred thirty-three thousand, five hundred forty".