285745689 has 12 divisors (see below), whose sum is σ = 413505456. Its totient is φ = 190145592.

The previous prime is 285745667. The next prime is 285745697. The reversal of 285745689 is 986547582.

285745689 is a `hidden beast` number, since 2 + 8 + 5 + 74 + 568 + 9 = 666.

It is not a de Polignac number, because 285745689 - 2²³ = 277357081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (285745619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24099 + ... + 33944.

It is an arithmetic number, because the mean of its divisors is an integer number (34458788).

Almost surely, 2^285745689 is an apocalyptic number.

It is an amenable number.

285745689 is a deficient number, since it is larger than the sum of its proper divisors (127759767).

285745689 is a wasteful number, since it uses less digits than its factorization.

285745689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58596 (or 58593 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The square root of 285745689 is about 16904.0139907656. The cubic root of 285745689 is about 658.6578855990.

The spelling of 285745689 in words is "two hundred eighty-five million, seven hundred forty-five thousand, six hundred eighty-nine".