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85524820 = 2254276241
BaseRepresentation
bin1010001100100…
…00000101010100
312221221002222221
411012100011110
5133343243240
612253032124
72055643333
oct506200524
9187832887
1085524820
1144305077
1224785644
1314946004
14b503d1a
157795a4a
hex5190154

85524820 has 12 divisors (see below), whose sum is σ = 179602164. Its totient is φ = 34209920.

The previous prime is 85524809. The next prime is 85524821. The reversal of 85524820 is 2842558.

It can be written as a sum of positive squares in 2 ways, for example, as 26357956 + 59166864 = 5134^2 + 7692^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85524821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2138101 + ... + 2138140.

It is an arithmetic number, because the mean of its divisors is an integer number (14966847).

Almost surely, 285524820 is an apocalyptic number.

It is an amenable number.

85524820 is an abundant number, since it is smaller than the sum of its proper divisors (94077344).

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

85524820 is a wasteful number, since it uses less digits than its factorization.

85524820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4276250 (or 4276248 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 34.

The square root of 85524820 is about 9247.9630189572. The cubic root of 85524820 is about 440.5860304218.

The spelling of 85524820 in words is "eighty-five million, five hundred twenty-four thousand, eight hundred twenty".

Divisors: 1 2 4 5 10 20 4276241 8552482 17104964 21381205 42762410 85524820