285288149 has 4 divisors (see below), whose sum is σ = 285769836. Its totient is φ = 284806464.

The previous prime is 285288131. The next prime is 285288163. The reversal of 285288149 is 941882582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 184144900 + 101143249 = 13570^2 + 10057^2 .

It is a cyclic number.

It is not a de Polignac number, because 285288149 - 2¹² = 285284053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285288119) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 239954 + ... + 241139.

It is an arithmetic number, because the mean of its divisors is an integer number (71442459).

Almost surely, 2^285288149 is an apocalyptic number.

It is an amenable number.

285288149 is a deficient number, since it is larger than the sum of its proper divisors (481687).

285288149 is an equidigital number, since it uses as much as digits as its factorization.

285288149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481686.

The product of its digits is 368640, while the sum is 47.

The square root of 285288149 is about 16890.4750969296. The cubic root of 285288149 is about 658.3061470516.

The spelling of 285288149 in words is "two hundred eighty-five million, two hundred eighty-eight thousand, one hundred forty-nine".