123994280 has 32 divisors (see below), whose sum is σ = 279433800. Its totient is φ = 49518336.

The previous prime is 123994271. The next prime is 123994301. The reversal of 123994280 is 82499321.

It can be written as a sum of positive squares in 4 ways, for example, as 118243876 + 5750404 = 10874^2 + 2398^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27206 + ... + 31434.

Almost surely, 2^123994280 is an apocalyptic number.

123994280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123994280 is an abundant number, since it is smaller than the sum of its proper divisors (155439520).

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

123994280 is a wasteful number, since it uses less digits than its factorization.

123994280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4973 (or 4969 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 123994280 is about 11135.2718871162. The cubic root of 123994280 is about 498.6554274906.

The spelling of 123994280 in words is "one hundred twenty-three million, nine hundred ninety-four thousand, two hundred eighty".