123712280 has 32 divisors (see below), whose sum is σ = 278769600. Its totient is φ = 49410816.

The previous prime is 123712279. The next prime is 123712283. The reversal of 123712280 is 82217321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123712283) 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, 30449 + ... + 34271.

It is an arithmetic number, because the mean of its divisors is an integer number (8711550).

Almost surely, 2^123712280 is an apocalyptic number.

123712280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123712280 is an abundant number, since it is smaller than the sum of its proper divisors (155057320).

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

123712280 is a wasteful number, since it uses less digits than its factorization.

123712280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4643 (or 4639 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 123712280 is about 11122.6022135110. The cubic root of 123712280 is about 498.2771101198.

The spelling of 123712280 in words is "one hundred twenty-three million, seven hundred twelve thousand, two hundred eighty".