123403680 has 216 divisors, whose sum is σ = 452255076. Its totient is φ = 30535680.

The previous prime is 123403673. The next prime is 123403711. The reversal of 123403680 is 86304321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 122677776 + 725904 = 11076^2 + 852^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1738045 + ... + 1738115.

Almost surely, 2^123403680 is an apocalyptic number.

123403680 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 123403680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226127538).

123403680 is an abundant number, since it is smaller than the sum of its proper divisors (328851396).

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

123403680 is a wasteful number, since it uses less digits than its factorization.

123403680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 123403680 is about 11108.7208984653. The cubic root of 123403680 is about 497.8624480994.

The spelling of 123403680 in words is "one hundred twenty-three million, four hundred three thousand, six hundred eighty".