123140440 has 32 divisors (see below), whose sum is σ = 284557680. Its totient is φ = 47924352.

The previous prime is 123140431. The next prime is 123140449. The reversal of 123140440 is 44041321.

It is an interprime number because it is at equal distance from previous prime (123140431) and next prime (123140449).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123140449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40122 + ... + 43081.

Almost surely, 2^123140440 is an apocalyptic number.

123140440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123140440 is an abundant number, since it is smaller than the sum of its proper divisors (161417240).

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

123140440 is a wasteful number, since it uses less digits than its factorization.

123140440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83251 (or 83247 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 123140440 is about 11096.8662242995. The cubic root of 123140440 is about 497.5081890523.

Adding to 123140440 its reverse (44041321), we get a palindrome (167181761).

The spelling of 123140440 in words is "one hundred twenty-three million, one hundred forty thousand, four hundred forty".