Search a number
-
+
284764081 = 7231768721
BaseRepresentation
bin10000111110010…
…010011110110001
3201211211111212211
4100332102132301
51040344422311
644131252121
710025311660
oct2076223661
9654744784
10284764081
11136818518
127b44a041
1346cc4c74
1429b68dd7
1519eee821
hex10f927b1

284764081 has 8 divisors (see below), whose sum is σ = 339594624. Its totient is φ = 233471040.

The previous prime is 284764069. The next prime is 284764121. The reversal of 284764081 is 180467482.

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 284764081 - 25 = 284764049 is a prime.

It is a super-2 number, since 2×2847640812 = 162181163655549122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (284764061) 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, 884200 + ... + 884521.

It is an arithmetic number, because the mean of its divisors is an integer number (42449328).

Almost surely, 2284764081 is an apocalyptic number.

It is an amenable number.

284764081 is a deficient number, since it is larger than the sum of its proper divisors (54830543).

284764081 is a wasteful number, since it uses less digits than its factorization.

284764081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768751.

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 284764081 is about 16874.9542517898. The cubic root of 284764081 is about 657.9028020433.

The spelling of 284764081 in words is "two hundred eighty-four million, seven hundred sixty-four thousand, eighty-one".

Divisors: 1 7 23 161 1768721 12381047 40680583 284764081