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989620 = 22549481
BaseRepresentation
bin11110001100110110100
31212021111121
43301212310
5223131440
633113324
711261122
oct3614664
91767447
10989620
11616575
123b8844
13288598
141ba912
1514834a
hexf19b4

989620 has 12 divisors (see below), whose sum is σ = 2078244. Its totient is φ = 395840.

The previous prime is 989581. The next prime is 989623. The reversal of 989620 is 26989.

It can be written as a sum of positive squares in 2 ways, for example, as 236196 + 753424 = 486^2 + 868^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989623) by changing a digit.

989620 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24721 + ... + 24760.

It is an arithmetic number, because the mean of its divisors is an integer number (173187).

2989620 is an apocalyptic number.

It is an amenable number.

989620 is an abundant number, since it is smaller than the sum of its proper divisors (1088624).

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

989620 is a wasteful number, since it uses less digits than its factorization.

989620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49490 (or 49488 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 989620 is about 994.7964615940. The cubic root of 989620 is about 99.6527958882.

The spelling of 989620 in words is "nine hundred eighty-nine thousand, six hundred twenty".

Divisors: 1 2 4 5 10 20 49481 98962 197924 247405 494810 989620