285306738 has 16 divisors (see below), whose sum is σ = 581380416. Its totient is φ = 93307760.

The previous prime is 285306709. The next prime is 285306757. The reversal of 285306738 is 837603582.

It is a self number, because there is not a number n which added to its sum of digits gives 285306738.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 448278 + ... + 448913.

It is an arithmetic number, because the mean of its divisors is an integer number (36336276).

Almost surely, 2^285306738 is an apocalyptic number.

285306738 is an abundant number, since it is smaller than the sum of its proper divisors (296073678).

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

285306738 is a wasteful number, since it uses less digits than its factorization.

285306738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897249.

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 285306738 is about 16891.0253685204. The cubic root of 285306738 is about 658.3204448615.

The spelling of 285306738 in words is "two hundred eighty-five million, three hundred six thousand, seven hundred thirty-eight".