285206745 has 16 divisors (see below), whose sum is σ = 466944192. Its totient is φ = 148572480.

The previous prime is 285206741. The next prime is 285206771. The reversal of 285206745 is 547602582.

It is not a de Polignac number, because 285206745 - 2² = 285206741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (285206741) 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, 220446 + ... + 221735.

It is an arithmetic number, because the mean of its divisors is an integer number (29184012).

Almost surely, 2^285206745 is an apocalyptic number.

It is an amenable number.

285206745 is a deficient number, since it is larger than the sum of its proper divisors (181737447).

285206745 is a wasteful number, since it uses less digits than its factorization.

285206745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442232.

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 285206745 is about 16888.0651644882. The cubic root of 285206745 is about 658.2435274959.

The spelling of 285206745 in words is "two hundred eighty-five million, two hundred six thousand, seven hundred forty-five".