282878380 has 48 divisors (see below), whose sum is σ = 621835200. Its totient is φ = 107889408.

The previous prime is 282878369. The next prime is 282878443. The reversal of 282878380 is 83878282.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 282878380.

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 15 ways as a sum of consecutive naturals, for example, 181846 + ... + 183394.

It is an arithmetic number, because the mean of its divisors is an integer number (12954900).

Almost surely, 2^282878380 is an apocalyptic number.

282878380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 282878380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310917600).

282878380 is an abundant number, since it is smaller than the sum of its proper divisors (338956820).

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

282878380 is a wasteful number, since it uses less digits than its factorization.

282878380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1978 (or 1976 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 46.

The square root of 282878380 is about 16818.9886735202. The cubic root of 282878380 is about 656.4473791170.

The spelling of 282878380 in words is "two hundred eighty-two million, eight hundred seventy-eight thousand, three hundred eighty".