123273780 has 144 divisors (see below), whose sum is σ = 409718400. Its totient is φ = 27127296.

The previous prime is 123273739. The next prime is 123273791. The reversal of 123273780 is 87372321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 353046 + ... + 353394.

Almost surely, 2^123273780 is an apocalyptic number.

123273780 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 123273780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204859200).

123273780 is an abundant number, since it is smaller than the sum of its proper divisors (286444620).

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

123273780 is a wasteful number, since it uses less digits than its factorization.

123273780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426 (or 395 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 123273780 is about 11102.8726012686. The cubic root of 123273780 is about 497.6876963211.

The spelling of 123273780 in words is "one hundred twenty-three million, two hundred seventy-three thousand, seven hundred eighty".