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80223820 = 22519121001
BaseRepresentation
bin1001100100000…
…01111001001100
312120221210101121
410302001321030
5131014130240
611543250324
71662614455
oct462017114
9176853347
1080223820
1141314386
1222a499a4
131380b221
14a92412c
15709a04a
hex4c81e4c

80223820 has 24 divisors (see below), whose sum is σ = 169360128. Its totient is φ = 31920000.

The previous prime is 80223817. The next prime is 80223827. The reversal of 80223820 is 2832208.

It is a super-2 number, since 2×802238202 = 12871722590784800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80223827) 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, 6681 + ... + 14320.

It is an arithmetic number, because the mean of its divisors is an integer number (7056672).

Almost surely, 280223820 is an apocalyptic number.

It is an amenable number.

80223820 is an abundant number, since it is smaller than the sum of its proper divisors (89136308).

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

80223820 is a wasteful number, since it uses less digits than its factorization.

80223820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21201 (or 21199 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 80223820 is about 8956.7750892830. The cubic root of 80223820 is about 431.2884018173.

The spelling of 80223820 in words is "eighty million, two hundred twenty-three thousand, eight hundred twenty".

Divisors: 1 2 4 5 10 20 191 382 764 955 1910 3820 21001 42002 84004 105005 210010 420020 4011191 8022382 16044764 20055955 40111910 80223820