284138778105 has 72 divisors (see below), whose sum is σ = 609493405248. Its totient is φ = 119900297088.

The previous prime is 284138778067. The next prime is 284138778139. The reversal of 284138778105 is 501877831482.

It is not a de Polignac number, because 284138778105 - 2⁸ = 284138777849 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2615487 + ... + 2721956.

It is an arithmetic number, because the mean of its divisors is an integer number (8465186184).

Almost surely, 2^284138778105 is an apocalyptic number.

It is an amenable number.

284138778105 is an abundant number, since it is smaller than the sum of its proper divisors (325354627143).

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

284138778105 is a wasteful number, since it uses less digits than its factorization.

284138778105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5337487 (or 5337471 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 54.

The spelling of 284138778105 in words is "two hundred eighty-four billion, one hundred thirty-eight million, seven hundred seventy-eight thousand, one hundred five".