123487680 has 112 divisors (see below), whose sum is σ = 394289280. Its totient is φ = 32744448.

The previous prime is 123487657. The next prime is 123487691. The reversal of 123487680 is 86784321.

It is a super-2 number, since 2×123487680² = 30498414223564800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294511 + ... + 294929.

It is an arithmetic number, because the mean of its divisors is an integer number (3520440).

Almost surely, 2^123487680 is an apocalyptic number.

123487680 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 123487680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197144640).

123487680 is an abundant number, since it is smaller than the sum of its proper divisors (270801600).

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

123487680 is a wasteful number, since it uses less digits than its factorization.

123487680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746 (or 736 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 123487680 is about 11112.5010686164. The cubic root of 123487680 is about 497.9753862772.

The spelling of 123487680 in words is "one hundred twenty-three million, four hundred eighty-seven thousand, six hundred eighty".