284378133 has 16 divisors (see below), whose sum is σ = 408697856. Its totient is φ = 174847680.

The previous prime is 284378123. The next prime is 284378137. The reversal of 284378133 is 331873482.

It is not a de Polignac number, because 284378133 - 2⁶ = 284378069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 284378091 and 284378100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284378137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54891 + ... + 59847.

It is an arithmetic number, because the mean of its divisors is an integer number (25543616).

Almost surely, 2^284378133 is an apocalyptic number.

It is an amenable number.

284378133 is a deficient number, since it is larger than the sum of its proper divisors (124319723).

284378133 is a wasteful number, since it uses less digits than its factorization.

284378133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6444.

The product of its digits is 96768, while the sum is 39.

The square root of 284378133 is about 16863.5148471486. The cubic root of 284378133 is about 657.6054435314.

The spelling of 284378133 in words is "two hundred eighty-four million, three hundred seventy-eight thousand, one hundred thirty-three".