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988 = 221319
BaseRepresentation
bin1111011100
31100121
433130
512423
64324
72611
oct1734
91317
10988
11819
126a4
135b0
14508
1545d
hex3dc

988 has 12 divisors (see below), whose sum is σ = 1960. Its totient is φ = 432.

The previous prime is 983. The next prime is 991. The reversal of 988 is 889.

Subtracting from 988 its reverse (889), we obtain a palindrome (99).

It can be divided in two parts, 98 and 8, that multiplied together give a square (784 = 282).

It is a super-2 number, since 2×9882 = 1952288, which contains 22 as substring.

It is a cake number, because a cake can be divided into 988 parts by 18 planar cuts.

Its product of digits (576) is a multiple of the sum of its prime factors (36).

It is a plaindrome in base 15.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (983) 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, 43 + ... + 61.

It is an amenable number.

988 is a deficient number, since it is larger than the sum of its proper divisors (972).

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

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

The sum of its prime factors is 36 (or 34 counting only the distinct ones).

The product of its digits is 576, while the sum is 25.

The square root of 988 is about 31.4324672910. The cubic root of 988 is about 9.9598389247.

The spelling of 988 in words is "nine hundred eighty-eight", and thus it is an aban number and an oban number.

Divisors: 1 2 4 13 19 26 38 52 76 247 494 988