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3070230781 = 18185719793
BaseRepresentation
bin1011011100000000…
…0000000011111101
321220222011212212011
42313000000003331
522241434341111
61224353411221
7136040350102
oct26700000375
97828155764
103070230781
111336079912
12718269b11
1339c104107
14211a88aa9
1512e818021
hexb70000fd

3070230781 has 8 divisors (see below), whose sum is σ = 3090951864. Its totient is φ = 3049551360.

The previous prime is 3070230743. The next prime is 3070230791. The reversal of 3070230781 is 1870320703.

It can be written as a sum of positive squares in 4 ways, for example, as 633327556 + 2436903225 = 25166^2 + 49365^2 .

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 3070230781 - 227 = 2936013053 is a prime.

It is a super-2 number, since 2×30702307812 = 18852634097199739922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3070230701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145221 + ... + 165013.

It is an arithmetic number, because the mean of its divisors is an integer number (386368983).

Almost surely, 23070230781 is an apocalyptic number.

It is an amenable number.

3070230781 is a deficient number, since it is larger than the sum of its proper divisors (20721083).

3070230781 is a wasteful number, since it uses less digits than its factorization.

3070230781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20831.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 3070230781 is about 55409.6632456831. The cubic root of 3070230781 is about 1453.4173508590.

The spelling of 3070230781 in words is "three billion, seventy million, two hundred thirty thousand, seven hundred eighty-one".

Divisors: 1 181 857 19793 155117 3582533 16962601 3070230781