285135906 has 16 divisors (see below), whose sum is σ = 622114848. Its totient is φ = 86404800.

The previous prime is 285135901. The next prime is 285135911. The reversal of 285135906 is 609531582.

It is an interprime number because it is at equal distance from previous prime (285135901) and next prime (285135911).

It is not an unprimeable number, because it can be changed into a prime (285135901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2160055 + ... + 2160186.

It is an arithmetic number, because the mean of its divisors is an integer number (38882178).

Almost surely, 2^285135906 is an apocalyptic number.

285135906 is an abundant number, since it is smaller than the sum of its proper divisors (336978942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

285135906 is a wasteful number, since it uses less digits than its factorization.

285135906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4320257.

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 285135906 is about 16885.9677247115. The cubic root of 285135906 is about 658.1890253086.

The spelling of 285135906 in words is "two hundred eighty-five million, one hundred thirty-five thousand, nine hundred six".