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250389 = 3243647
BaseRepresentation
bin111101001000010101
3110201110200
4331020111
531003024
65211113
72061666
oct751025
9421420
10250389
11161137
12100a99
1389c79
146736d
154e2c9
hex3d215

250389 has 12 divisors (see below), whose sum is σ = 370656. Its totient is φ = 162792.

The previous prime is 250361. The next prime is 250403. The reversal of 250389 is 983052.

250389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 250389 - 213 = 242197 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (250489) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64 + ... + 710.

It is an arithmetic number, because the mean of its divisors is an integer number (30888).

2250389 is an apocalyptic number.

It is an amenable number.

250389 is a deficient number, since it is larger than the sum of its proper divisors (120267).

250389 is a wasteful number, since it uses less digits than its factorization.

250389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696 (or 693 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 250389 is about 500.3888487966. The cubic root of 250389 is about 63.0287095150.

The spelling of 250389 in words is "two hundred fifty thousand, three hundred eighty-nine".

Divisors: 1 3 9 43 129 387 647 1941 5823 27821 83463 250389