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389632 = 29761
BaseRepresentation
bin1011111001000000000
3201210110211
41133020000
544432012
612203504
73211645
oct1371000
9653424
10389632
11246811
12169594
13108469
14a1dcc
157a6a7
hex5f200

389632 has 20 divisors (see below), whose sum is σ = 779526. Its totient is φ = 194560.

The previous prime is 389629. The next prime is 389651. The reversal of 389632 is 236983.

It is a happy number.

389632 is nontrivially palindromic in base 15.

It can be written as a sum of positive squares in only one way, i.e., 389376 + 256 = 624^2 + 16^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 389594 and 389603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132 + ... + 892.

2389632 is an apocalyptic number.

389632 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389763).

389632 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

389632 is an frugal number, since it uses more digits than its factorization.

389632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779 (or 763 counting only the distinct ones).

The product of its digits is 7776, while the sum is 31.

The square root of 389632 is about 624.2050945002. The cubic root of 389632 is about 73.0384485018.

The spelling of 389632 in words is "three hundred eighty-nine thousand, six hundred thirty-two".

Divisors: 1 2 4 8 16 32 64 128 256 512 761 1522 3044 6088 12176 24352 48704 97408 194816 389632