287009980 has 48 divisors (see below), whose sum is σ = 642872160. Its totient is φ = 107255808.

The previous prime is 287009969. The next prime is 287010019. The reversal of 287009980 is 89900782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44224 + ... + 50296.

It is an arithmetic number, because the mean of its divisors is an integer number (13393170).

Almost surely, 2^287009980 is an apocalyptic number.

287009980 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 287009980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321436080).

287009980 is an abundant number, since it is smaller than the sum of its proper divisors (355862180).

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

287009980 is a wasteful number, since it uses less digits than its factorization.

287009980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6238 (or 6236 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 287009980 is about 16941.3688939235. The cubic root of 287009980 is about 659.6278740937.

The spelling of 287009980 in words is "two hundred eighty-seven million, nine thousand, nine hundred eighty".