123240442040 has 32 divisors (see below), whose sum is σ = 284054193360. Its totient is φ = 48093830400.

The previous prime is 123240442033. The next prime is 123240442063. The reversal of 123240442040 is 40244042321.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37571666 + ... + 37574945.

Almost surely, 2^123240442040 is an apocalyptic number.

123240442040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123240442040 is an abundant number, since it is smaller than the sum of its proper divisors (160813751320).

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

123240442040 is a wasteful number, since it uses less digits than its factorization.

123240442040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75146663 (or 75146659 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 123240442040 its reverse (40244042321), we get a palindrome (163484484361).

The spelling of 123240442040 in words is "one hundred twenty-three billion, two hundred forty million, four hundred forty-two thousand, forty".