285170397 has 16 divisors (see below), whose sum is σ = 385680960. Its totient is φ = 187402752.

The previous prime is 285170381. The next prime is 285170407. The reversal of 285170397 is 793071582.

It is not a de Polignac number, because 285170397 - 2⁴ = 285170381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285170357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76458 + ... + 80100.

It is an arithmetic number, because the mean of its divisors is an integer number (24105060).

Almost surely, 2^285170397 is an apocalyptic number.

It is an amenable number.

285170397 is a deficient number, since it is larger than the sum of its proper divisors (100510563).

285170397 is a wasteful number, since it uses less digits than its factorization.

285170397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4012.

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 285170397 is about 16886.9889856066. The cubic root of 285170397 is about 658.2155631594.

The spelling of 285170397 in words is "two hundred eighty-five million, one hundred seventy thousand, three hundred ninety-seven".