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47992 = 237857
BaseRepresentation
bin1011101101111000
32102211111
423231320
53013432
61010104
7256630
oct135570
972744
1047992
113306a
1223934
1318ac9
14136c0
15e347
hexbb78

47992 has 16 divisors (see below), whose sum is σ = 102960. Its totient is φ = 20544.

The previous prime is 47981. The next prime is 48017. The reversal of 47992 is 29974.

Subtracting from 47992 its sum of digits (31), we obtain a square (47961 = 2192).

It is a congruent number.

It is an unprimeable number.

47992 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, 373 + ... + 484.

It is an arithmetic number, because the mean of its divisors is an integer number (6435).

247992 is an apocalyptic number.

It is an amenable number.

47992 is an abundant number, since it is smaller than the sum of its proper divisors (54968).

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 (51480).

47992 is a wasteful number, since it uses less digits than its factorization.

47992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870 (or 866 counting only the distinct ones).

The product of its digits is 4536, while the sum is 31.

The square root of 47992 is about 219.0707648227. The cubic root of 47992 is about 36.3403927216.

The spelling of 47992 in words is "forty-seven thousand, nine hundred ninety-two".

Divisors: 1 2 4 7 8 14 28 56 857 1714 3428 5999 6856 11998 23996 47992