123495680 has 216 divisors, whose sum is σ = 377485920. Its totient is φ = 38277120.

The previous prime is 123495637. The next prime is 123495683. The reversal of 123495680 is 86594321.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123495683) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 689831 + ... + 690009.

It is an arithmetic number, because the mean of its divisors is an integer number (1747620).

Almost surely, 2^123495680 is an apocalyptic number.

123495680 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 123495680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188742960).

123495680 is an abundant number, since it is smaller than the sum of its proper divisors (253990240).

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

123495680 is a wasteful number, since it uses less digits than its factorization.

123495680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 123495680 is about 11112.8610177578. The cubic root of 123495680 is about 497.9861396227.

The spelling of 123495680 in words is "one hundred twenty-three million, four hundred ninety-five thousand, six hundred eighty".