123043620 has 192 divisors, whose sum is σ = 439326720. Its totient is φ = 25049088.

The previous prime is 123043577. The next prime is 123043621. The reversal of 123043620 is 26340321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (123043621) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 135207 + ... + 136113.

It is an arithmetic number, because the mean of its divisors is an integer number (2288160).

Almost surely, 2^123043620 is an apocalyptic number.

123043620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123043620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219663360).

123043620 is an abundant number, since it is smaller than the sum of its proper divisors (316283100).

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

123043620 is a wasteful number, since it uses less digits than its factorization.

123043620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962 (or 960 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 123043620 is about 11092.5028735628. The cubic root of 123043620 is about 497.3777651431.

Adding to 123043620 its reverse (26340321), we get a palindrome (149383941).

It can be divided in two parts, 1230 and 43620, that added together give a triangular number (44850 = T₂₉₉).

The spelling of 123043620 in words is "one hundred twenty-three million, forty-three thousand, six hundred twenty".