287890268 has 6 divisors (see below), whose sum is σ = 503807976. Its totient is φ = 143945132.

The previous prime is 287890247. The next prime is 287890297. The reversal of 287890268 is 862098782.

It is a super-2 number, since 2×287890268² = 165761612818223648, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35986280 + ... + 35986287.

It is an arithmetic number, because the mean of its divisors is an integer number (83967996).

Almost surely, 2^287890268 is an apocalyptic number.

It is an amenable number.

287890268 is a deficient number, since it is larger than the sum of its proper divisors (215917708).

287890268 is a wasteful number, since it uses less digits than its factorization.

287890268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71972571 (or 71972569 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 50.

The square root of 287890268 is about 16967.3294304083. The cubic root of 287890268 is about 660.3015671151.

The spelling of 287890268 in words is "two hundred eighty-seven million, eight hundred ninety thousand, two hundred sixty-eight".