287840146 has 32 divisors (see below), whose sum is σ = 487710720. Its totient is φ = 126224400.

The previous prime is 287840123. The next prime is 287840183. The reversal of 287840146 is 641048782.

It is a junction number, because it is equal to n+sod(n) for n = 287840099 and 287840108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 399975 + ... + 400693.

It is an arithmetic number, because the mean of its divisors is an integer number (15240960).

Almost surely, 2^287840146 is an apocalyptic number.

287840146 is a deficient number, since it is larger than the sum of its proper divisors (199870574).

287840146 is a wasteful number, since it uses less digits than its factorization.

287840146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350.

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 287840146 is about 16965.8523511199. The cubic root of 287840146 is about 660.2632451574.

The spelling of 287840146 in words is "two hundred eighty-seven million, eight hundred forty thousand, one hundred forty-six".