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8990980 = 225449549
BaseRepresentation
bin100010010011…
…000100000100
3121220210022021
4202103010010
54300202410
6520412524
7136264525
oct42230404
917823267
108990980
115091069
123017144
131b2a50b
1412a084c
15bc8eda
hex893104

8990980 has 12 divisors (see below), whose sum is σ = 18881100. Its totient is φ = 3596384.

The previous prime is 8990939. The next prime is 8990981. The reversal of 8990980 is 890998.

It can be written as a sum of positive squares in 2 ways, for example, as 4804864 + 4186116 = 2192^2 + 2046^2 .

It is not an unprimeable number, because it can be changed into a prime (8990981) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 224755 + ... + 224794.

It is an arithmetic number, because the mean of its divisors is an integer number (1573425).

Almost surely, 28990980 is an apocalyptic number.

It is an amenable number.

8990980 is an abundant number, since it is smaller than the sum of its proper divisors (9890120).

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

8990980 is a wasteful number, since it uses less digits than its factorization.

8990980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449558 (or 449556 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 8990980 is about 2998.4962898093. The cubic root of 8990980 is about 207.9388688697.

The spelling of 8990980 in words is "eight million, nine hundred ninety thousand, nine hundred eighty".

Divisors: 1 2 4 5 10 20 449549 899098 1798196 2247745 4495490 8990980