287055340 has 96 divisors (see below), whose sum is σ = 732836160. Its totient is φ = 93004800.

The previous prime is 287055331. The next prime is 287055359. The reversal of 287055340 is 43550782.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 287055296 and 287055305.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81210 + ... + 84670.

It is an arithmetic number, because the mean of its divisors is an integer number (7633710).

Almost surely, 2^287055340 is an apocalyptic number.

287055340 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 287055340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366418080).

287055340 is an abundant number, since it is smaller than the sum of its proper divisors (445780820).

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

287055340 is a wasteful number, since it uses less digits than its factorization.

287055340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3523 (or 3521 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 287055340 is about 16942.7075758274. The cubic root of 287055340 is about 659.6626221819.

The spelling of 287055340 in words is "two hundred eighty-seven million, fifty-five thousand, three hundred forty".