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30800756 = 2271100027
BaseRepresentation
bin111010101111…
…1101101110100
32010221211200202
41311133231310
530341111011
63020100032
7522542060
oct165375564
963854622
1030800756
1116428078
12a394618
1364c55cc
14413aaa0
152a8623b
hex1d5fb74

30800756 has 12 divisors (see below), whose sum is σ = 61601568. Its totient is φ = 13200312.

The previous prime is 30800713. The next prime is 30800779. The reversal of 30800756 is 65700803.

30800756 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 549986 + ... + 550041.

It is an arithmetic number, because the mean of its divisors is an integer number (5133464).

Almost surely, 230800756 is an apocalyptic number.

It is an amenable number.

30800756 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

30800756 is a wasteful number, since it uses less digits than its factorization.

30800756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100038 (or 1100036 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 30800756 is about 5549.8428806589. The cubic root of 30800756 is about 313.4636061084.

The spelling of 30800756 in words is "thirty million, eight hundred thousand, seven hundred fifty-six".

Divisors: 1 2 4 7 14 28 1100027 2200054 4400108 7700189 15400378 30800756