287897985900 has 162 divisors, whose sum is σ = 1049731055100. Its totient is φ = 65805243840.

The previous prime is 287897985847. The next prime is 287897985913. The reversal of 287897985900 is 9589798782.

287897985900 is a `hidden beast` number, since 28 + 7 + 8 + 9 + 7 + 9 + 8 + 590 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 3220050 + ... + 3308249.

Almost surely, 2^287897985900 is an apocalyptic number.

287897985900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

287897985900 is an abundant number, since it is smaller than the sum of its proper divisors (761833069200).

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

287897985900 is a wasteful number, since it uses less digits than its factorization.

287897985900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6528333 (or 6528316 counting only the distinct ones).

The product of its (nonzero) digits is 182891520, while the sum is 72.

The spelling of 287897985900 in words is "two hundred eighty-seven billion, eight hundred ninety-seven million, nine hundred eighty-five thousand, nine hundred".