287122241880 has 192 divisors, whose sum is σ = 988962099840. Its totient is φ = 71994679296.

The previous prime is 287122241779. The next prime is 287122241881. The reversal of 287122241880 is 88142221782.

287122241880 is a `hidden beast` number, since 2 + 8 + 7 + 1 + 222 + 418 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287122241881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6692257 + ... + 6735023.

It is an arithmetic number, because the mean of its divisors is an integer number (5150844270).

Almost surely, 2^287122241880 is an apocalyptic number.

287122241880 is a gapful number since it is divisible by the number (20) 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 287122241880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (494481049920).

287122241880 is an abundant number, since it is smaller than the sum of its proper divisors (701839857960).

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

287122241880 is a wasteful number, since it uses less digits than its factorization.

287122241880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43898 (or 43891 counting only the distinct ones).

The product of its (nonzero) digits is 229376, while the sum is 45.

The spelling of 287122241880 in words is "two hundred eighty-seven billion, one hundred twenty-two million, two hundred forty-one thousand, eight hundred eighty".