285378973 has 16 divisors (see below), whose sum is σ = 316973376. Its totient is φ = 254759040.

The previous prime is 285378959. The next prime is 285378991. The reversal of 285378973 is 379873582.

It is a cyclic number.

It is not a de Polignac number, because 285378973 - 2¹³ = 285370781 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 285378973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285378913) 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 in 15 ways as a sum of consecutive naturals, for example, 221790 + ... + 223072.

It is an arithmetic number, because the mean of its divisors is an integer number (19810836).

Almost surely, 2^285378973 is an apocalyptic number.

It is an amenable number.

285378973 is a deficient number, since it is larger than the sum of its proper divisors (31594403).

285378973 is a wasteful number, since it uses less digits than its factorization.

285378973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644.

The product of its digits is 2540160, while the sum is 52.

The square root of 285378973 is about 16893.1634988832. The cubic root of 285378973 is about 658.3759988300.

The spelling of 285378973 in words is "two hundred eighty-five million, three hundred seventy-eight thousand, nine hundred seventy-three".