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389956 = 22719733
BaseRepresentation
bin1011111001101000100
3201210220211
41133031010
544434311
612205204
73212620
oct1371504
9653824
10389956
11246a86
12169804
13108658
14a2180
157a821
hex5f344

389956 has 24 divisors (see below), whose sum is σ = 822080. Its totient is φ = 158112.

The previous prime is 389953. The next prime is 389957. The reversal of 389956 is 659983.

It is not an unprimeable number, because it can be changed into a prime (389953) 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, 166 + ... + 898.

2389956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (411040).

389956 is an abundant number, since it is smaller than the sum of its proper divisors (432124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

389956 is a wasteful number, since it uses less digits than its factorization.

389956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763 (or 761 counting only the distinct ones).

The product of its digits is 58320, while the sum is 40.

The square root of 389956 is about 624.4645706523. The cubic root of 389956 is about 73.0586880277.

The spelling of 389956 in words is "three hundred eighty-nine thousand, nine hundred fifty-six".

Divisors: 1 2 4 7 14 19 28 38 76 133 266 532 733 1466 2932 5131 10262 13927 20524 27854 55708 97489 194978 389956