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7040 = 27511
BaseRepresentation
bin1101110000000
3100122202
41232000
5211130
652332
726345
oct15600
910582
107040
115320
1240a8
133287
1427cc
152145
hex1b80

7040 has 32 divisors (see below), whose sum is σ = 18360. Its totient is φ = 2560.

The previous prime is 7039. The next prime is 7043. The reversal of 7040 is 407.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (11).

7040 is a Rhonda number in base 6.

It is a plaindrome in base 14.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 635 + ... + 645.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9180).

7040 is an abundant number, since it is smaller than the sum of its proper divisors (11320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7040 is a wasteful number, since it uses less digits than its factorization.

7040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30 (or 18 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 11.

The square root of 7040 is about 83.9047078536. The cubic root of 7040 is about 19.1656794283.

Adding to 7040 its reverse (407), we get a palindrome (7447).

The spelling of 7040 in words is "seven thousand, forty", and thus it is an iban number.

Divisors: 1 2 4 5 8 10 11 16 20 22 32 40 44 55 64 80 88 110 128 160 176 220 320 352 440 640 704 880 1408 1760 3520 7040