Search a number
-
+
7008381 = 32778709
BaseRepresentation
bin11010101111000001111101
3111012001200200
4122233001331
53243232011
6410114113
7113366412
oct32570175
914161620
107008381
113a57556
12241b939
1315b4c93
14d06109
15936856
hex6af07d

7008381 has 6 divisors (see below), whose sum is σ = 10123230. Its totient is φ = 4672248.

The previous prime is 7008361. The next prime is 7008413. The reversal of 7008381 is 1838007.

It can be written as a sum of positive squares in only one way, i.e., 5405625 + 1602756 = 2325^2 + 1266^2 .

It is not a de Polignac number, because 7008381 - 26 = 7008317 is a prime.

It is a super-2 number, since 2×70083812 = 98234808482322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7008341) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 389346 + ... + 389363.

It is an arithmetic number, because the mean of its divisors is an integer number (1687205).

Almost surely, 27008381 is an apocalyptic number.

It is an amenable number.

7008381 is a deficient number, since it is larger than the sum of its proper divisors (3114849).

7008381 is a wasteful number, since it uses less digits than its factorization.

7008381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778715 (or 778712 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 7008381 is about 2647.3346973891. The cubic root of 7008381 is about 191.3694320015.

The spelling of 7008381 in words is "seven million, eight thousand, three hundred eighty-one".

Divisors: 1 3 9 778709 2336127 7008381