123287580 has 288 divisors, whose sum is σ = 440294400. Its totient is φ = 27661824.

The previous prime is 123287573. The next prime is 123287581. The reversal of 123287580 is 85782321.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123287581) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 2089591 + ... + 2089649.

It is an arithmetic number, because the mean of its divisors is an integer number (1528800).

Almost surely, 2^123287580 is an apocalyptic number.

123287580 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 123287580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220147200).

123287580 is an abundant number, since it is smaller than the sum of its proper divisors (317006820).

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

123287580 is a wasteful number, since it uses less digits than its factorization.

123287580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 123287580 is about 11103.4940446690. The cubic root of 123287580 is about 497.7062670016.

The spelling of 123287580 in words is "one hundred twenty-three million, two hundred eighty-seven thousand, five hundred eighty".