123532340240 has 20 divisors (see below), whose sum is σ = 287212691244. Its totient is φ = 49412936064.

The previous prime is 123532340213. The next prime is 123532340273. The reversal of 123532340240 is 42043235321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 35840547856 + 87691792384 = 189316^2 + 296128^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×123532340240² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 772077047 + ... + 772077206.

Almost surely, 2^123532340240 is an apocalyptic number.

123532340240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123532340240 is an abundant number, since it is smaller than the sum of its proper divisors (163680351004).

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

123532340240 is a wasteful number, since it uses less digits than its factorization.

123532340240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544154266 (or 1544154260 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 123532340240 its reverse (42043235321), we get a palindrome (165575575561).

The spelling of 123532340240 in words is "one hundred twenty-three billion, five hundred thirty-two million, three hundred forty thousand, two hundred forty".