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64986 = 2310831
BaseRepresentation
bin1111110111011010
310022010220
433313122
54034421
61220510
7360315
oct176732
9108126
1064986
1144909
1231736
132376c
141997c
15143c6
hexfdda

64986 has 8 divisors (see below), whose sum is σ = 129984. Its totient is φ = 21660.

The previous prime is 64969. The next prime is 64997. The reversal of 64986 is 68946.

It is a sphenic number, since it is the product of 3 distinct primes.

64986 is an admirable number.

It is a nialpdrome in base 16.

It is an unprimeable number.

64986 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5410 + ... + 5421.

It is an arithmetic number, because the mean of its divisors is an integer number (16248).

264986 is an apocalyptic number.

64986 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.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64992).

64986 is a wasteful number, since it uses less digits than its factorization.

64986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10836.

The product of its digits is 10368, while the sum is 33.

The square root of 64986 is about 254.9235179421. The cubic root of 64986 is about 40.2043707037.

The spelling of 64986 in words is "sixty-four thousand, nine hundred eighty-six".

Divisors: 1 2 3 6 10831 21662 32493 64986