123143280 has 160 divisors (see below), whose sum is σ = 425597760. Its totient is φ = 29245440.

The previous prime is 123143263. The next prime is 123143281. The reversal of 123143280 is 82341321.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 123143280.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123143281) 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, 89800 + ... + 91160.

It is an arithmetic number, because the mean of its divisors is an integer number (2659986).

Almost surely, 2^123143280 is an apocalyptic number.

123143280 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 123143280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212798880).

123143280 is an abundant number, since it is smaller than the sum of its proper divisors (302454480).

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

123143280 is a wasteful number, since it uses less digits than its factorization.

123143280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419 (or 1413 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 123143280 is about 11096.9941876168. The cubic root of 123143280 is about 497.5120137163.

The spelling of 123143280 in words is "one hundred twenty-three million, one hundred forty-three thousand, two hundred eighty".