285045293 has 4 divisors (see below), whose sum is σ = 306971868. Its totient is φ = 263118720.

The previous prime is 285045287. The next prime is 285045301. The reversal of 285045293 is 392540582.

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 40998409 + 244046884 = 6403^2 + 15622^2 .

It is a cyclic number.

It is not a de Polignac number, because 285045293 - 2²⁰ = 283996717 is a prime.

It is a super-2 number, since 2×285045293² = 162501638122911698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285045223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10963268 + ... + 10963293.

It is an arithmetic number, because the mean of its divisors is an integer number (76742967).

Almost surely, 2^285045293 is an apocalyptic number.

It is an amenable number.

285045293 is a deficient number, since it is larger than the sum of its proper divisors (21926575).

285045293 is a wasteful number, since it uses less digits than its factorization.

285045293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21926574.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 285045293 is about 16883.2844257271. The cubic root of 285045293 is about 658.1192962195.

The spelling of 285045293 in words is "two hundred eighty-five million, forty-five thousand, two hundred ninety-three".