Search a number
-
+
30772361849 = 149327977369
BaseRepresentation
bin11100101010001011…
…001111101001111001
32221102120121221122112
4130222023033221321
51001010211034344
622045302302105
72136365521445
oct345213175171
987376557575
1030772361849
1112061217a09
125b69727935
132b953bc048
1416bcc5b825
15c01841c9e
hex72a2cfa79

30772361849 has 8 divisors (see below), whose sum is σ = 30808162440. Its totient is φ = 30736584576.

The previous prime is 30772361839. The next prime is 30772361887. The reversal of 30772361849 is 94816327703.

It can be written as a sum of positive squares in 4 ways, for example, as 21237815824 + 9534546025 = 145732^2 + 97645^2 .

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 30772361849 - 224 = 30755584633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30772361797 and 30772361806.

It is not an unprimeable number, because it can be changed into a prime (30772361839) 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, 4172237 + ... + 4179605.

It is an arithmetic number, because the mean of its divisors is an integer number (3851020305).

Almost surely, 230772361849 is an apocalyptic number.

It is an amenable number.

30772361849 is a deficient number, since it is larger than the sum of its proper divisors (35800591).

30772361849 is a wasteful number, since it uses less digits than its factorization.

30772361849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11659.

The product of its (nonzero) digits is 1524096, while the sum is 50.

The spelling of 30772361849 in words is "thirty billion, seven hundred seventy-two million, three hundred sixty-one thousand, eight hundred forty-nine".

Divisors: 1 1493 2797 7369 4175921 11001917 20611093 30772361849