123206040 has 48 divisors (see below), whose sum is σ = 400420800. Its totient is φ = 32854848.

The previous prime is 123206033. The next prime is 123206053. The reversal of 123206040 is 40602321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170760 + ... + 171479.

It is an arithmetic number, because the mean of its divisors is an integer number (8342100).

Almost surely, 2^123206040 is an apocalyptic number.

123206040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123206040 is an abundant number, since it is smaller than the sum of its proper divisors (277214760).

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

123206040 is a wasteful number, since it uses less digits than its factorization.

123206040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342256 (or 342249 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 123206040 is about 11099.8216201883. The cubic root of 123206040 is about 497.5965183980.

Adding to 123206040 its reverse (40602321), we get a palindrome (163808361).

It can be divided in two parts, 1232060 and 40, that added together give a square (1232100 = 1110²).

The spelling of 123206040 in words is "one hundred twenty-three million, two hundred six thousand, forty".