287222238 has 24 divisors (see below), whose sum is σ = 628734288. Its totient is φ = 94753152.

The previous prime is 287222227. The next prime is 287222251. The reversal of 287222238 is 832222782.

It is a super-2 number, since 2×287222238² = 164993228003457288, 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 in 11 ways as a sum of consecutive naturals, for example, 80506 + ... + 83997.

It is an arithmetic number, because the mean of its divisors is an integer number (26197262).

Almost surely, 2^287222238 is an apocalyptic number.

287222238 is an abundant number, since it is smaller than the sum of its proper divisors (341512050).

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

287222238 is a wasteful number, since it uses less digits than its factorization.

287222238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164608 (or 164605 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 287222238 is about 16947.6322240011. The cubic root of 287222238 is about 659.7904431124.

The spelling of 287222238 in words is "two hundred eighty-seven million, two hundred twenty-two thousand, two hundred thirty-eight".