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4978 = 219131
BaseRepresentation
bin1001101110010
320211101
41031302
5124403
635014
720341
oct11562
96741
104978
113816
122a6a
13235c
141b58
15171d
hex1372

4978 has 8 divisors (see below), whose sum is σ = 7920. Its totient is φ = 2340.

The previous prime is 4973. The next prime is 4987. The reversal of 4978 is 8794.

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

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (4973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28 + ... + 103.

It is an arithmetic number, because the mean of its divisors is an integer number (990).

4978 is a deficient number, since it is larger than the sum of its proper divisors (2942).

4978 is a wasteful number, since it uses less digits than its factorization.

4978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152.

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

The square root of 4978 is about 70.5549431295. The cubic root of 4978 is about 17.0746429459.

Subtracting from 4978 its sum of digits (28), we obtain a triangular number (4950 = T99).

It can be divided in two parts, 497 and 8, that added together give a palindrome (505).

The spelling of 4978 in words is "four thousand, nine hundred seventy-eight".

Divisors: 1 2 19 38 131 262 2489 4978