287239422240 has 192 divisors, whose sum is σ = 1008038908800. Its totient is φ = 76391396352.

The previous prime is 287239422233. The next prime is 287239422269. The reversal of 287239422240 is 42224932782.

287239422240 is a `hidden beast` number, since 287 + 23 + 94 + 22 + 240 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1522231 + ... + 1700489.

It is an arithmetic number, because the mean of its divisors is an integer number (5250202650).

Almost surely, 2^287239422240 is an apocalyptic number.

287239422240 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 287239422240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (504019454400).

287239422240 is an abundant number, since it is smaller than the sum of its proper divisors (720799486560).

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

287239422240 is a wasteful number, since it uses less digits than its factorization.

287239422240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178656 (or 178642 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 287239422240 in words is "two hundred eighty-seven billion, two hundred thirty-nine million, four hundred twenty-two thousand, two hundred forty".