287807226 has 32 divisors (see below), whose sum is σ = 671846400. Its totient is φ = 80480496.

The previous prime is 287807207. The next prime is 287807227. The reversal of 287807226 is 622708782.

287807226 is nontrivially palindromic in base 5.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (287807227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70926 + ... + 74873.

It is an arithmetic number, because the mean of its divisors is an integer number (20995200).

Almost surely, 2^287807226 is an apocalyptic number.

287807226 is an abundant number, since it is smaller than the sum of its proper divisors (384039174).

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

287807226 is a wasteful number, since it uses less digits than its factorization.

287807226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145858.

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 287807226 is about 16964.8821392900. The cubic root of 287807226 is about 660.2380729741.

The spelling of 287807226 in words is "two hundred eighty-seven million, eight hundred seven thousand, two hundred twenty-six".