1027980 has 36 divisors (see below), whose sum is σ = 3118752. Its totient is φ = 274080.
The previous prime is 1027969. The next prime is 1027987. The reversal of 1027980 is 897201.
It is a tau number, because it is divible by the number of its divisors (36).
It is not an unprimeable number, because it can be changed into a prime (1027987) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2676 + ... + 3035.
It is an arithmetic number, because the mean of its divisors is an integer number (86632).
21027980 is an apocalyptic number.
1027980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
1027980 is an abundant number, since it is smaller than the sum of its proper divisors (2090772).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1027980 is a wasteful number, since it uses less digits than its factorization.
1027980 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 5726 (or 5721 counting only the distinct ones).
The product of its (nonzero) digits is 1008, while the sum is 27.
The square root of 1027980 is about 1013.8934855299. The cubic root of 1027980 is about 100.9241007400.
The spelling of 1027980 in words is "one million, twenty-seven thousand, nine hundred eighty".
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