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8380231 = 44318917
BaseRepresentation
bin11111111101111101000111
3120202202111221
4133331331013
54121131411
6455341211
7131142106
oct37757507
916682457
108380231
114804212
122981807
131975522
14118203d
15b08071
hex7fdf47

8380231 has 4 divisors (see below), whose sum is σ = 8399592. Its totient is φ = 8360872.

The previous prime is 8380223. The next prime is 8380237. The reversal of 8380231 is 1320838.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8380231 - 23 = 8380223 is a prime.

It is a super-2 number, since 2×83802312 = 140456543226722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8380196 and 8380205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8380237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9016 + ... + 9901.

It is an arithmetic number, because the mean of its divisors is an integer number (2099898).

Almost surely, 28380231 is an apocalyptic number.

8380231 is a deficient number, since it is larger than the sum of its proper divisors (19361).

8380231 is a wasteful number, since it uses less digits than its factorization.

8380231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19360.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 8380231 is about 2894.8628637640. The cubic root of 8380231 is about 203.1196767362.

The spelling of 8380231 in words is "eight million, three hundred eighty thousand, two hundred thirty-one".

Divisors: 1 443 18917 8380231