123294280 has 32 divisors (see below), whose sum is σ = 278623800. Its totient is φ = 49102336.

The previous prime is 123294239. The next prime is 123294289. The reversal of 123294280 is 82492321.

It can be written as a sum of positive squares in 4 ways, for example, as 115906756 + 7387524 = 10766^2 + 2718^2 .

It is not an unprimeable number, because it can be changed into a prime (123294289) 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, 2706 + ... + 15934.

Almost surely, 2^123294280 is an apocalyptic number.

123294280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123294280 is an abundant number, since it is smaller than the sum of its proper divisors (155329520).

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

123294280 is a wasteful number, since it uses less digits than its factorization.

123294280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13473 (or 13469 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 123294280 is about 11103.7957474010. The cubic root of 123294280 is about 497.7152827018.

The spelling of 123294280 in words is "one hundred twenty-three million, two hundred ninety-four thousand, two hundred eighty".