123740430 has 64 divisors (see below), whose sum is σ = 325036800. Its totient is φ = 29899520.

The previous prime is 123740417. The next prime is 123740431. The reversal of 123740430 is 34047321.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 123740430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123740431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187441 + ... + 188099.

It is an arithmetic number, because the mean of its divisors is an integer number (5078700).

Almost surely, 2^123740430 is an apocalyptic number.

123740430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 123740430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162518400).

123740430 is an abundant number, since it is smaller than the sum of its proper divisors (201296370).

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

123740430 is a wasteful number, since it uses less digits than its factorization.

123740430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 123740430 is about 11123.8675828149. The cubic root of 123740430 is about 498.3149005932.

Adding to 123740430 its reverse (34047321), we get a palindrome (157787751).

The spelling of 123740430 in words is "one hundred twenty-three million, seven hundred forty thousand, four hundred thirty".