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47980 = 2252399
BaseRepresentation
bin1011101101101100
32102211001
423231230
53013410
61010044
7256612
oct135554
972731
1047980
1133059
1223924
1318aba
14136b2
15e33a
hexbb6c

47980 has 12 divisors (see below), whose sum is σ = 100800. Its totient is φ = 19184.

The previous prime is 47977. The next prime is 47981. The reversal of 47980 is 8974.

It is not an unprimeable number, because it can be changed into a prime (47981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1180 + ... + 1219.

It is an arithmetic number, because the mean of its divisors is an integer number (8400).

247980 is an apocalyptic number.

It is an amenable number.

47980 is an abundant number, since it is smaller than the sum of its proper divisors (52820).

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 (50400).

47980 is a wasteful number, since it uses less digits than its factorization.

47980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408 (or 2406 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 47980 is about 219.0433747001. The cubic root of 47980 is about 36.3373635982.

The spelling of 47980 in words is "forty-seven thousand, nine hundred eighty".

Divisors: 1 2 4 5 10 20 2399 4798 9596 11995 23990 47980