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80380280 = 2353754311
BaseRepresentation
bin1001100101010…
…00000101111000
312121020202000102
410302220011320
5131034132110
611550454532
71664135561
oct462500570
9177222012
1080380280
1141410992
1222b04448
13138644c6
14a965168
1570cb5a5
hex4ca8178

80380280 has 32 divisors (see below), whose sum is σ = 185747040. Its totient is φ = 31282560.

The previous prime is 80380259. The next prime is 80380283. The reversal of 80380280 is 8208308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80380283) 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 7 ways as a sum of consecutive naturals, for example, 25676 + ... + 28635.

It is an arithmetic number, because the mean of its divisors is an integer number (5804595).

Almost surely, 280380280 is an apocalyptic number.

It is an amenable number.

80380280 is an abundant number, since it is smaller than the sum of its proper divisors (105366760).

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

80380280 is a wasteful number, since it uses less digits than its factorization.

80380280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54359 (or 54355 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 80380280 is about 8965.5050052967. The cubic root of 80380280 is about 431.5685994054.

Adding to 80380280 its reverse (8208308), we get a palindrome (88588588).

The spelling of 80380280 in words is "eighty million, three hundred eighty thousand, two hundred eighty".

Divisors: 1 2 4 5 8 10 20 37 40 74 148 185 296 370 740 1480 54311 108622 217244 271555 434488 543110 1086220 2009507 2172440 4019014 8038028 10047535 16076056 20095070 40190140 80380280