285978216 has 48 divisors (see below), whose sum is σ = 759493440. Its totient is φ = 89716480.

The previous prime is 285978197. The next prime is 285978223. The reversal of 285978216 is 612879582.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13680 + ... + 27551.

It is an arithmetic number, because the mean of its divisors is an integer number (15822780).

Almost surely, 2^285978216 is an apocalyptic number.

It is an amenable number.

285978216 is an abundant number, since it is smaller than the sum of its proper divisors (473515224).

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

285978216 is a wasteful number, since it uses less digits than its factorization.

285978216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41274 (or 41253 counting only the distinct ones).

The product of its digits is 483840, while the sum is 48.

The square root of 285978216 is about 16910.8904555615. The cubic root of 285978216 is about 658.8364992207.

The spelling of 285978216 in words is "two hundred eighty-five million, nine hundred seventy-eight thousand, two hundred sixteen".