287884740 has 288 divisors, whose sum is σ = 996105600. Its totient is φ = 61501440.

The previous prime is 287884703. The next prime is 287884741. The reversal of 287884740 is 47488782.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 287884740.

It is not an unprimeable number, because it can be changed into a prime (287884741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3234616 + ... + 3234704.

It is an arithmetic number, because the mean of its divisors is an integer number (3458700).

Almost surely, 2^287884740 is an apocalyptic number.

287884740 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 287884740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (498052800).

287884740 is an abundant number, since it is smaller than the sum of its proper divisors (708220860).

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

287884740 is a wasteful number, since it uses less digits than its factorization.

287884740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 802816, while the sum is 48.

The square root of 287884740 is about 16967.1665283276. The cubic root of 287884740 is about 660.2973407705.

The spelling of 287884740 in words is "two hundred eighty-seven million, eight hundred eighty-four thousand, seven hundred forty".