284440645 has 8 divisors (see below), whose sum is σ = 350554104. Its totient is φ = 221402304.

The previous prime is 284440643. The next prime is 284440649. The reversal of 284440645 is 546044482.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9345249 + 275095396 = 3057^2 + 16586^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 284440645 - 2¹ = 284440643 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284440643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 768574 + ... + 768943.

It is an arithmetic number, because the mean of its divisors is an integer number (43819263).

Almost surely, 2^284440645 is an apocalyptic number.

It is an amenable number.

284440645 is a deficient number, since it is larger than the sum of its proper divisors (66113459).

284440645 is a wasteful number, since it uses less digits than its factorization.

284440645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537559.

The product of its (nonzero) digits is 122880, while the sum is 37.

The square root of 284440645 is about 16865.3682141838. The cubic root of 284440645 is about 657.6536249431.

The spelling of 284440645 in words is "two hundred eighty-four million, four hundred forty thousand, six hundred forty-five".