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70580 = 2253529
BaseRepresentation
bin10001001110110100
310120211002
4101032310
54224310
61302432
7412526
oct211664
9116732
1070580
1149034
1234a18
1326183
141ba16
1515da5
hex113b4

70580 has 12 divisors (see below), whose sum is σ = 148260. Its totient is φ = 28224.

The previous prime is 70573. The next prime is 70583. The reversal of 70580 is 8507.

It can be written as a sum of positive squares in 2 ways, for example, as 14884 + 55696 = 122^2 + 236^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 3529 = 70580 / (7 + 0 + 5 + 8 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70583) by changing a digit.

70580 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, 1745 + ... + 1784.

It is an arithmetic number, because the mean of its divisors is an integer number (12355).

270580 is an apocalyptic number.

It is an amenable number.

70580 is an abundant number, since it is smaller than the sum of its proper divisors (77680).

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 (74130).

70580 is a wasteful number, since it uses less digits than its factorization.

70580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3538 (or 3536 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 70580 is about 265.6689669495. The cubic root of 70580 is about 41.3263660357.

The spelling of 70580 in words is "seventy thousand, five hundred eighty".

Divisors: 1 2 4 5 10 20 3529 7058 14116 17645 35290 70580