123022440040 has 64 divisors (see below), whose sum is σ = 295050114000. Its totient is φ = 46003458048.

The previous prime is 123022439977. The next prime is 123022440041. The reversal of 123022440040 is 40044220321.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 60952696996 + 62069743044 = 246886^2 + 249138^2 .

It is a junction number, because it is equal to n+sod(n) for n = 123022439993 and 123022440020.

It is not an unprimeable number, because it can be changed into a prime (123022440041) 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 15 ways as a sum of consecutive naturals, for example, 505779 + ... + 708418.

Almost surely, 2^123022440040 is an apocalyptic number.

123022440040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123022440040 is an abundant number, since it is smaller than the sum of its proper divisors (172027673960).

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

123022440040 is a wasteful number, since it uses less digits than its factorization.

123022440040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214374 (or 1214370 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 123022440040 its reverse (40044220321), we get a palindrome (163066660361).

The spelling of 123022440040 in words is "one hundred twenty-three billion, twenty-two million, four hundred forty thousand, forty".