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30070580 = 2251503529
BaseRepresentation
bin111001010110…
…1011100110100
32002120202002012
41302231130310
530144224310
62552303352
7513411221
oct162553464
962522065
1030070580
1115a79521
12a0a1b58
1362cb157
143dca948
15298ec05
hex1cad734

30070580 has 12 divisors (see below), whose sum is σ = 63148260. Its totient is φ = 12028224.

The previous prime is 30070567. The next prime is 30070583. The reversal of 30070580 is 8507003.

It can be written as a sum of positive squares in 2 ways, for example, as 21473956 + 8596624 = 4634^2 + 2932^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30070583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 751745 + ... + 751784.

It is an arithmetic number, because the mean of its divisors is an integer number (5262355).

Almost surely, 230070580 is an apocalyptic number.

It is an amenable number.

30070580 is an abundant number, since it is smaller than the sum of its proper divisors (33077680).

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

30070580 is a wasteful number, since it uses less digits than its factorization.

30070580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1503538 (or 1503536 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 30070580 is about 5483.6648329379. The cubic root of 30070580 is about 310.9667358266.

Adding to 30070580 its reverse (8507003), we get a palindrome (38577583).

The spelling of 30070580 in words is "thirty million, seventy thousand, five hundred eighty".

Divisors: 1 2 4 5 10 20 1503529 3007058 6014116 7517645 15035290 30070580