284736561 has 4 divisors (see below), whose sum is σ = 379648752. Its totient is φ = 189824372.

The previous prime is 284736559. The next prime is 284736577. The reversal of 284736561 is 165637482.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 284736561 - 2¹ = 284736559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (284731561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47456091 + ... + 47456096.

It is an arithmetic number, because the mean of its divisors is an integer number (94912188).

Almost surely, 2^284736561 is an apocalyptic number.

It is an amenable number.

284736561 is a deficient number, since it is larger than the sum of its proper divisors (94912191).

284736561 is an equidigital number, since it uses as much as digits as its factorization.

284736561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94912190.

The product of its digits is 241920, while the sum is 42.

The square root of 284736561 is about 16874.1388224703. The cubic root of 284736561 is about 657.8816078109.

The spelling of 284736561 in words is "two hundred eighty-four million, seven hundred thirty-six thousand, five hundred sixty-one".