285630057 has 20 divisors (see below), whose sum is σ = 428373396. Its totient is φ = 189665280.

The previous prime is 285630049. The next prime is 285630101. The reversal of 285630057 is 750036582.

It can be written as a sum of positive squares in 2 ways, for example, as 191850201 + 93779856 = 13851^2 + 9684^2 .

It is not a de Polignac number, because 285630057 - 2³ = 285630049 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285830057) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 13957 + ... + 27677.

Almost surely, 2^285630057 is an apocalyptic number.

285630057 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

285630057 is a deficient number, since it is larger than the sum of its proper divisors (142743339).

285630057 is a wasteful number, since it uses less digits than its factorization.

285630057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13990 (or 13981 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 285630057 is about 16900.5933919493. The cubic root of 285630057 is about 658.5690277938.

The spelling of 285630057 in words is "two hundred eighty-five million, six hundred thirty thousand, fifty-seven".