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2028007801 is a prime number
BaseRepresentation
bin111100011100000…
…1111000101111001
312020100001110201001
41320320033011321
513123132222201
6533123125001
7101153532121
oct17070170571
95210043631
102028007801
11950837306
12487213761
13264202621
141534a9c81
15bd096301
hex78e0f179

2028007801 has 2 divisors, whose sum is σ = 2028007802. Its totient is φ = 2028007800.

The previous prime is 2028007783. The next prime is 2028007811. The reversal of 2028007801 is 1087008202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2019603600 + 8404201 = 44940^2 + 2899^2 .

It is a cyclic number.

It is not a de Polignac number, because 2028007801 - 217 = 2027876729 is a prime.

It is a super-2 number, since 2×20280078012 = 8225631281833711202, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2028007801.

It is not a weakly prime, because it can be changed into another prime (2028007811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1014003900 + 1014003901.

It is an arithmetic number, because the mean of its divisors is an integer number (1014003901).

Almost surely, 22028007801 is an apocalyptic number.

It is an amenable number.

2028007801 is a deficient number, since it is larger than the sum of its proper divisors (1).

2028007801 is an equidigital number, since it uses as much as digits as its factorization.

2028007801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 2028007801 is about 45033.4076103508. The cubic root of 2028007801 is about 1265.7750776101.

The spelling of 2028007801 in words is "two billion, twenty-eight million, seven thousand, eight hundred one".