123319780 has 24 divisors (see below), whose sum is σ = 259301952. Its totient is φ = 49264992.

The previous prime is 123319753. The next prime is 123319783. The reversal of 123319780 is 87913321.

It is not an unprimeable number, because it can be changed into a prime (123319783) 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, 14169 + ... + 21151.

It is an arithmetic number, because the mean of its divisors is an integer number (10804248).

Almost surely, 2^123319780 is an apocalyptic number.

123319780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123319780 is an abundant number, since it is smaller than the sum of its proper divisors (135982172).

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

123319780 is a wasteful number, since it uses less digits than its factorization.

123319780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7875 (or 7873 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 123319780 is about 11104.9439440278. The cubic root of 123319780 is about 497.7495932009.

The spelling of 123319780 in words is "one hundred twenty-three million, three hundred nineteen thousand, seven hundred eighty".