123123002440 has 32 divisors (see below), whose sum is σ = 277036751160. Its totient is φ = 49247424000.

The previous prime is 123123002423. The next prime is 123123002441. The reversal of 123123002440 is 44200321321.

It can be written as a sum of positive squares in 4 ways, for example, as 91304291556 + 31818710884 = 302166^2 + 178378^2 .

It is not an unprimeable number, because it can be changed into a prime (123123002441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2097490 + ... + 2155390.

Almost surely, 2^123123002440 is an apocalyptic number.

123123002440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123123002440 is an abundant number, since it is smaller than the sum of its proper divisors (153913748720).

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

123123002440 is a wasteful number, since it uses less digits than its factorization.

123123002440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111073 (or 111069 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 123123002440 its reverse (44200321321), we get a palindrome (167323323761).

The spelling of 123123002440 in words is "one hundred twenty-three billion, one hundred twenty-three million, two thousand, four hundred forty".