123210040 has 16 divisors (see below), whose sum is σ = 277222680. Its totient is φ = 49284000.

The previous prime is 123210029. The next prime is 123210049. The reversal of 123210040 is 40012321.

It is a self number, because there is not a number n which added to its sum of digits gives 123210040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123210049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1540086 + ... + 1540165.

Almost surely, 2^123210040 is an apocalyptic number.

123210040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123210040 is an abundant number, since it is smaller than the sum of its proper divisors (154012640).

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

123210040 is a wasteful number, since it uses less digits than its factorization.

123210040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3080262 (or 3080258 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 123210040 is about 11100.0018018017. The cubic root of 123210040 is about 497.6019033195.

Adding to 123210040 its reverse (40012321), we get a palindrome (163222361).

The spelling of 123210040 in words is "one hundred twenty-three million, two hundred ten thousand, forty".