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30868901 = 719317487
BaseRepresentation
bin111010111000…
…0010110100101
32011002022011122
41311300112211
530400301101
63021343325
7523244540
oct165602645
964068148
1030868901
1116474298
12a407b45
13651a62b
144157857
152a9b51b
hex1d705a5

30868901 has 16 divisors (see below), whose sum is σ = 38338560. Its totient is φ = 24254640.

The previous prime is 30868897. The next prime is 30868931. The reversal of 30868901 is 10986803.

It is not a de Polignac number, because 30868901 - 22 = 30868897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30868931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 380 + ... + 7866.

It is an arithmetic number, because the mean of its divisors is an integer number (2396160).

Almost surely, 230868901 is an apocalyptic number.

30868901 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

30868901 is a deficient number, since it is larger than the sum of its proper divisors (7469659).

30868901 is a wasteful number, since it uses less digits than its factorization.

30868901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7544.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 30868901 is about 5555.9788516516. The cubic root of 30868901 is about 313.6946095664.

The spelling of 30868901 in words is "thirty million, eight hundred sixty-eight thousand, nine hundred one".

Divisors: 1 7 19 31 133 217 589 4123 7487 52409 142253 232097 995771 1624679 4409843 30868901