123530780 has 24 divisors (see below), whose sum is σ = 273068880. Its totient is φ = 46811520.

The previous prime is 123530767. The next prime is 123530783. The reversal of 123530780 is 87035321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123530783) 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, 162161 + ... + 162920.

It is an arithmetic number, because the mean of its divisors is an integer number (11377870).

Almost surely, 2^123530780 is an apocalyptic number.

123530780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123530780 is an abundant number, since it is smaller than the sum of its proper divisors (149538100).

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

123530780 is a wasteful number, since it uses less digits than its factorization.

123530780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325109 (or 325107 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 123530780 is about 11114.4401568410. The cubic root of 123530780 is about 498.0333144383.

The spelling of 123530780 in words is "one hundred twenty-three million, five hundred thirty thousand, seven hundred eighty".