287980895 has 8 divisors (see below), whose sum is σ = 348064080. Its totient is φ = 228726720.

The previous prime is 287980873. The next prime is 287980937. The reversal of 287980895 is 598089782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-287980895 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 287980895.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206486 + ... + 207875.

It is an arithmetic number, because the mean of its divisors is an integer number (43508010).

Almost surely, 2^287980895 is an apocalyptic number.

287980895 is a deficient number, since it is larger than the sum of its proper divisors (60083185).

287980895 is a wasteful number, since it uses less digits than its factorization.

287980895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414505.

The product of its (nonzero) digits is 2903040, while the sum is 56.

The square root of 287980895 is about 16969.9998526812. Note that the first 3 decimals coincide. The cubic root of 287980895 is about 660.3708468356.

The spelling of 287980895 in words is "two hundred eighty-seven million, nine hundred eighty thousand, eight hundred ninety-five".