285880385 has 8 divisors (see below), whose sum is σ = 392064576. Its totient is φ = 196032240.

The previous prime is 285880351. The next prime is 285880417. The reversal of 285880385 is 583088582.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 285880385 - 2¹⁴ = 285864001 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4083971 + ... + 4084040.

It is an arithmetic number, because the mean of its divisors is an integer number (49008072).

Almost surely, 2^285880385 is an apocalyptic number.

It is an amenable number.

285880385 is a deficient number, since it is larger than the sum of its proper divisors (106184191).

285880385 is an equidigital number, since it uses as much as digits as its factorization.

285880385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8168023.

The product of its (nonzero) digits is 614400, while the sum is 47.

The square root of 285880385 is about 16907.9976638276. The cubic root of 285880385 is about 658.7613629794.

It can be divided in two parts, 2858 and 80385, that multiplied together give a triangular number (229740330 = T₂₁₄₃₅).

The spelling of 285880385 in words is "two hundred eighty-five million, eight hundred eighty thousand, three hundred eighty-five".