123023152240 has 40 divisors (see below), whose sum is σ = 288977598000. Its totient is φ = 48701945856.

The previous prime is 123023152171. The next prime is 123023152271. The reversal of 123023152240 is 42251320321.

It is a tau number, because it is divible by the number of its divisors (40).

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, 7918990 + ... + 7934509.

It is an arithmetic number, because the mean of its divisors is an integer number (7224439950).

Almost surely, 2^123023152240 is an apocalyptic number.

123023152240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123023152240 is an abundant number, since it is smaller than the sum of its proper divisors (165954445760).

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

123023152240 is a wasteful number, since it uses less digits than its factorization.

123023152240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15853609 (or 15853603 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 123023152240 its reverse (42251320321), we get a palindrome (165274472561).

The spelling of 123023152240 in words is "one hundred twenty-three billion, twenty-three million, one hundred fifty-two thousand, two hundred forty".