285880477 has 2 divisors, whose sum is σ = 285880478. Its totient is φ = 285880476.

The previous prime is 285880459. The next prime is 285880487. The reversal of 285880477 is 774088582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 256352121 + 29528356 = 16011^2 + 5434^2 .

It is a cyclic number.

It is not a de Polignac number, because 285880477 - 2⁷ = 285880349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 285880477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285880417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142940238 + 142940239.

It is an arithmetic number, because the mean of its divisors is an integer number (142940239).

Almost surely, 2^285880477 is an apocalyptic number.

It is an amenable number.

285880477 is a deficient number, since it is larger than the sum of its proper divisors (1).

285880477 is an equidigital number, since it uses as much as digits as its factorization.

285880477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1003520, while the sum is 49.

The square root of 285880477 is about 16908.0003844334. Note that the first 3 decimals coincide. The cubic root of 285880477 is about 658.7614336453.

The spelling of 285880477 in words is "two hundred eighty-five million, eight hundred eighty thousand, four hundred seventy-seven".