286408404 has 18 divisors (see below), whose sum is σ = 723976890. Its totient is φ = 95469456.

The previous prime is 286408403. The next prime is 286408433. The reversal of 286408404 is 404804682.

286408404 is a `hidden beast` number, since 2 + 8 + 640 + 8 + 4 + 0 + 4 = 666.

286408404 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 241491600 + 44916804 = 15540^2 + 6702^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 7955789 = 286408404 / (2 + 8 + 6 + 4 + 0 + 8 + 4 + 0 + 4).

286408404 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (286408403) 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 5 ways as a sum of consecutive naturals, for example, 3977859 + ... + 3977930.

Almost surely, 2^286408404 is an apocalyptic number.

It is an amenable number.

286408404 is an abundant number, since it is smaller than the sum of its proper divisors (437568486).

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

286408404 is a wasteful number, since it uses less digits than its factorization.

286408404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7955799 (or 7955794 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 36.

The square root of 286408404 is about 16923.6049351195. The cubic root of 286408404 is about 659.1666893584.

The spelling of 286408404 in words is "two hundred eighty-six million, four hundred eight thousand, four hundred four".