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80906052 = 2236742171
BaseRepresentation
bin1001101001010…
…00011101000100
312122020110020110
410310220131010
5131202443202
612010033020
72001455463
oct464503504
9178213213
1080906052
114173aa07
1223118770
13139b9906
14aa609da
15718226c
hex4d28744

80906052 has 12 divisors (see below), whose sum is σ = 188780816. Its totient is φ = 26968680.

The previous prime is 80906039. The next prime is 80906053. The reversal of 80906052 is 25060908.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (80906053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3371074 + ... + 3371097.

Almost surely, 280906052 is an apocalyptic number.

It is an amenable number.

80906052 is an abundant number, since it is smaller than the sum of its proper divisors (107874764).

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

80906052 is a wasteful number, since it uses less digits than its factorization.

80906052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6742178 (or 6742176 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 80906052 is about 8994.7791523750. The cubic root of 80906052 is about 432.5075267938.

The spelling of 80906052 in words is "eighty million, nine hundred six thousand, fifty-two".

Divisors: 1 2 3 4 6 12 6742171 13484342 20226513 26968684 40453026 80906052