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80051380 = 2254393083
BaseRepresentation
bin1001100010101…
…11110010110100
312120122000211221
410301113302310
5130443121010
611535440124
71661265643
oct461276264
9176560757
1080051380
1141206872
1222986044
131377a8a6
14a8bb35a
157063dda
hex4c57cb4

80051380 has 24 divisors (see below), whose sum is σ = 172019232. Its totient is φ = 31275552.

The previous prime is 80051297. The next prime is 80051383. The reversal of 80051380 is 8315008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80051383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45682 + ... + 47401.

It is an arithmetic number, because the mean of its divisors is an integer number (7167468).

Almost surely, 280051380 is an apocalyptic number.

It is an amenable number.

80051380 is an abundant number, since it is smaller than the sum of its proper divisors (91967852).

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

80051380 is a wasteful number, since it uses less digits than its factorization.

80051380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93135 (or 93133 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 80051380 is about 8947.1436782920. The cubic root of 80051380 is about 430.9791639771.

Adding to 80051380 its reverse (8315008), we get a palindrome (88366388).

The spelling of 80051380 in words is "eighty million, fifty-one thousand, three hundred eighty".

Divisors: 1 2 4 5 10 20 43 86 172 215 430 860 93083 186166 372332 465415 930830 1861660 4002569 8005138 16010276 20012845 40025690 80051380