287899920000 has 1600 divisors, whose sum is σ = 1337136229440. Its totient is φ = 59719680000.

The previous prime is 287899919981. The next prime is 287899920013. The reversal of 287899920000 is 29998782.

It is a tau number, because it is divible by the number of its divisors (1600).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

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 199 ways as a sum of consecutive naturals, for example, 498959712 + ... + 498960288.

Almost surely, 2^287899920000 is an apocalyptic number.

287899920000 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 287899920000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (668568114720).

287899920000 is an abundant number, since it is smaller than the sum of its proper divisors (1049236309440).

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

287899920000 is an equidigital number, since it uses as much as digits as its factorization.

287899920000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641 (or 605 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The spelling of 287899920000 in words is "two hundred eighty-seven billion, eight hundred ninety-nine million, nine hundred twenty thousand".