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87228886 = 21915714621
BaseRepresentation
bin1010011001100…
…00000111010110
320002010200112111
411030300013112
5134312311021
612353341234
72106301423
oct514600726
9202120474
1087228886
1145269398
122526781a
13150c1834
14b828d4a
1579d08e1
hex53301d6

87228886 has 16 divisors (see below), whose sum is σ = 138616560. Its totient is φ = 41052960.

The previous prime is 87228803. The next prime is 87228893. The reversal of 87228886 is 68882278.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1345 + ... + 13276.

It is an arithmetic number, because the mean of its divisors is an integer number (8663535).

Almost surely, 287228886 is an apocalyptic number.

87228886 is a deficient number, since it is larger than the sum of its proper divisors (51387674).

87228886 is a wasteful number, since it uses less digits than its factorization.

87228886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14799.

The product of its digits is 688128, while the sum is 49.

The square root of 87228886 is about 9339.6405712426. The cubic root of 87228886 is about 443.4930060961.

The spelling of 87228886 in words is "eighty-seven million, two hundred twenty-eight thousand, eight hundred eighty-six".

Divisors: 1 2 19 38 157 314 2983 5966 14621 29242 277799 555598 2295497 4590994 43614443 87228886