285618457 has 2 divisors, whose sum is σ = 285618458. Its totient is φ = 285618456.

The previous prime is 285618449. The next prime is 285618481. The reversal of 285618457 is 754816582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 285474816 + 143641 = 16896^2 + 379^2 .

It is a cyclic number.

It is not a de Polignac number, because 285618457 - 2³ = 285618449 is a prime.

It is not a weakly prime, because it can be changed into another prime (285618497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142809228 + 142809229.

It is an arithmetic number, because the mean of its divisors is an integer number (142809229).

Almost surely, 2^285618457 is an apocalyptic number.

It is an amenable number.

285618457 is a deficient number, since it is larger than the sum of its proper divisors (1).

285618457 is an equidigital number, since it uses as much as digits as its factorization.

285618457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 537600, while the sum is 46.

The square root of 285618457 is about 16900.2502052484. The cubic root of 285618457 is about 658.5601124107.

The spelling of 285618457 in words is "two hundred eighty-five million, six hundred eighteen thousand, four hundred fifty-seven".