284378465 has 16 divisors (see below), whose sum is σ = 412947072. Its totient is φ = 183531264.

The previous prime is 284378459. The next prime is 284378473. The reversal of 284378465 is 564873482.

It is not a de Polignac number, because 284378465 - 2⁸ = 284378209 is a prime.

It is a super-2 number, since 2×284378465² = 161742222711512450, which contains 22 as substring.

It is a Duffinian number.

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, 238379 + ... + 239568.

It is an arithmetic number, because the mean of its divisors is an integer number (25809192).

Almost surely, 2^284378465 is an apocalyptic number.

It is an amenable number.

284378465 is a deficient number, since it is larger than the sum of its proper divisors (128568607).

284378465 is a wasteful number, since it uses less digits than its factorization.

284378465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477976.

The product of its digits is 1290240, while the sum is 47.

The square root of 284378465 is about 16863.5246908824. The cubic root of 284378465 is about 657.6056994406.

The spelling of 284378465 in words is "two hundred eighty-four million, three hundred seventy-eight thousand, four hundred sixty-five".