286978867920 has 160 divisors (see below), whose sum is σ = 1009514672640. Its totient is φ = 74899422720.

The previous prime is 286978867907. The next prime is 286978867927. The reversal of 286978867920 is 29768879682.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (286978867927) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1311891 + ... + 1514930.

It is an arithmetic number, because the mean of its divisors is an integer number (6309466704).

Almost surely, 2^286978867920 is an apocalyptic number.

286978867920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

286978867920 is an abundant number, since it is smaller than the sum of its proper divisors (722535804720).

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

286978867920 is a wasteful number, since it uses less digits than its factorization.

286978867920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2826890 (or 2826878 counting only the distinct ones).

The product of its (nonzero) digits is 292626432, while the sum is 72.

The spelling of 286978867920 in words is "two hundred eighty-six billion, nine hundred seventy-eight million, eight hundred sixty-seven thousand, nine hundred twenty".