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86821902 = 23343139269
BaseRepresentation
bin1010010110011…
…00110000001110
320001101000021000
411023030300032
5134211300102
612340521130
72102655036
oct513146016
9201330230
1086821902
1145010642
12250b01a6
1314cab50b
14b7608c6
15795001c
hex52ccc0e

86821902 has 64 divisors (see below), whose sum is σ = 199584000. Its totient is φ = 27959904.

The previous prime is 86821877. The next prime is 86821913. The reversal of 86821902 is 20912868.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 322624 + ... + 322892.

It is an arithmetic number, because the mean of its divisors is an integer number (3118500).

Almost surely, 286821902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86821902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99792000).

86821902 is an abundant number, since it is smaller than the sum of its proper divisors (112762098).

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

86821902 is a wasteful number, since it uses less digits than its factorization.

86821902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 456 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 86821902 is about 9317.8271072176. The cubic root of 86821902 is about 442.8021951845.

The spelling of 86821902 in words is "eighty-six million, eight hundred twenty-one thousand, nine hundred two".

Divisors: 1 2 3 6 9 18 27 43 54 86 129 139 258 269 278 387 417 538 774 807 834 1161 1251 1614 2322 2421 2502 3753 4842 5977 7263 7506 11567 11954 14526 17931 23134 34701 35862 37391 53793 69402 74782 104103 107586 112173 161379 208206 224346 312309 322758 336519 624618 673038 1009557 1607813 2019114 3215626 4823439 9646878 14470317 28940634 43410951 86821902