64940 has 24 divisors (see below), whose sum is σ = 145152. Its totient is φ = 24320.
The previous prime is 64937. The next prime is 64951. The reversal of 64940 is 4946.
It is an unprimeable 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 7 ways as a sum of consecutive naturals, for example, 245 + ... + 435.
It is an arithmetic number, because the mean of its divisors is an integer number (6048).
264940 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 64940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72576).
64940 is an abundant number, since it is smaller than the sum of its proper divisors (80212).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
64940 is a wasteful number, since it uses less digits than its factorization.
64940 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 217 (or 215 counting only the distinct ones).
The product of its (nonzero) digits is 864, while the sum is 23.
The square root of 64940 is about 254.8332788315. The cubic root of 64940 is about 40.1948823135.
The spelling of 64940 in words is "sixty-four thousand, nine hundred forty".
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