123423630 has 80 divisors (see below), whose sum is σ = 326995920. Its totient is φ = 29814400.

The previous prime is 123423607. The next prime is 123423637. The reversal of 123423630 is 36324321.

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 123423630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123423637) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 439090 + ... + 439370.

It is an arithmetic number, because the mean of its divisors is an integer number (4087449).

Almost surely, 2^123423630 is an apocalyptic number.

123423630 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 123423630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163497960).

123423630 is an abundant number, since it is smaller than the sum of its proper divisors (203572290).

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

123423630 is an equidigital number, since it uses as much as digits as its factorization.

123423630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 123423630 is about 11109.6188053416. The cubic root of 123423630 is about 497.8892755561.

Adding to 123423630 its reverse (36324321), we get a palindrome (159747951).

The spelling of 123423630 in words is "one hundred twenty-three million, four hundred twenty-three thousand, six hundred thirty".