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207020080 = 2452587751
BaseRepresentation
bin11000101011011…
…10000000110000
3112102112201011101
430111232000300
5410444120310
632313054144
75062433041
oct1425560060
9472481141
10207020080
11a6948283
12593b7354
1333b746b7
141d6cc8c8
151329443a
hexc56e030

207020080 has 20 divisors (see below), whose sum is σ = 481321872. Its totient is φ = 82808000.

The previous prime is 207020063. The next prime is 207020081. The reversal of 207020080 is 80020702.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (207020081) 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, 1293796 + ... + 1293955.

Almost surely, 2207020080 is an apocalyptic number.

207020080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

207020080 is an abundant number, since it is smaller than the sum of its proper divisors (274301792).

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

207020080 is a wasteful number, since it uses less digits than its factorization.

207020080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2587764 (or 2587758 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 207020080 is about 14388.1923812548. The cubic root of 207020080 is about 591.5672970283.

Adding to 207020080 its reverse (80020702), we get a palindrome (287040782).

The spelling of 207020080 in words is "two hundred seven million, twenty thousand, eighty".

Divisors: 1 2 4 5 8 10 16 20 40 80 2587751 5175502 10351004 12938755 20702008 25877510 41404016 51755020 103510040 207020080