286878320 has 40 divisors (see below), whose sum is σ = 676142736. Its totient is φ = 113177088.

The previous prime is 286878313. The next prime is 286878323. The reversal of 286878320 is 23878682.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (286878323) 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, 18722 + ... + 30401.

Almost surely, 2^286878320 is an apocalyptic number.

286878320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

286878320 is an abundant number, since it is smaller than the sum of its proper divisors (389264416).

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

286878320 is a wasteful number, since it uses less digits than its factorization.

286878320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49209 (or 49203 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 286878320 is about 16937.4826937181. The cubic root of 286878320 is about 659.5269950360.

The spelling of 286878320 in words is "two hundred eighty-six million, eight hundred seventy-eight thousand, three hundred twenty".