123536280 has 256 divisors, whose sum is σ = 461583360. Its totient is φ = 25804800.

The previous prime is 123536251. The next prime is 123536323. The reversal of 123536280 is 82635321.

It is a super-2 number, since 2×123536280² = 30522424952476800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 585375 + ... + 585585.

It is an arithmetic number, because the mean of its divisors is an integer number (1803060).

Almost surely, 2^123536280 is an apocalyptic number.

123536280 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 123536280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230791680).

123536280 is an abundant number, since it is smaller than the sum of its proper divisors (338047080).

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

123536280 is a wasteful number, since it uses less digits than its factorization.

123536280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 123536280 is about 11114.6875799547. The cubic root of 123536280 is about 498.0407056935.

The spelling of 123536280 in words is "one hundred twenty-three million, five hundred thirty-six thousand, two hundred eighty".