284440649 has 2 divisors, whose sum is σ = 284440650. Its totient is φ = 284440648.

The previous prime is 284440643. The next prime is 284440687. The reversal of 284440649 is 946044482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194323600 + 90117049 = 13940^2 + 9493^2 .

It is a cyclic number.

It is not a de Polignac number, because 284440649 - 2²⁰ = 283392073 is a prime.

It is not a weakly prime, because it can be changed into another prime (284440643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142220324 + 142220325.

It is an arithmetic number, because the mean of its divisors is an integer number (142220325).

Almost surely, 2^284440649 is an apocalyptic number.

It is an amenable number.

284440649 is a deficient number, since it is larger than the sum of its proper divisors (1).

284440649 is an equidigital number, since it uses as much as digits as its factorization.

284440649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 41.

The square root of 284440649 is about 16865.3683327700. The cubic root of 284440649 is about 657.6536280259.

The spelling of 284440649 in words is "two hundred eighty-four million, four hundred forty thousand, six hundred forty-nine".