287065980 has 72 divisors (see below), whose sum is σ = 894321792. Its totient is φ = 74480256.

The previous prime is 287065951. The next prime is 287066023. The reversal of 287065980 is 89560782.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14892 + ... + 28211.

It is an arithmetic number, because the mean of its divisors is an integer number (12421136).

Almost surely, 2^287065980 is an apocalyptic number.

287065980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

287065980 is an abundant number, since it is smaller than the sum of its proper divisors (607255812).

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

287065980 is a wasteful number, since it uses less digits than its factorization.

287065980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43155 (or 43150 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 287065980 is about 16943.0215723170. The cubic root of 287065980 is about 659.6707724380.

The spelling of 287065980 in words is "two hundred eighty-seven million, sixty-five thousand, nine hundred eighty".