123982780 has 24 divisors (see below), whose sum is σ = 260573040. Its totient is φ = 49553280.

The previous prime is 123982759. The next prime is 123982783. The reversal of 123982780 is 87289321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123982783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47920 + ... + 50440.

It is an arithmetic number, because the mean of its divisors is an integer number (10857210).

Almost surely, 2^123982780 is an apocalyptic number.

123982780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123982780 is an abundant number, since it is smaller than the sum of its proper divisors (136590260).

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

123982780 is a wasteful number, since it uses less digits than its factorization.

123982780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4989 (or 4987 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 123982780 is about 11134.7554979892. The cubic root of 123982780 is about 498.6400108797.

The spelling of 123982780 in words is "one hundred twenty-three million, nine hundred eighty-two thousand, seven hundred eighty".